Sum and Difference Identities & Formulas - Sine, Cosine, Tangent - Degrees & Radians, Trigonometry

[@TheOrganicChemistryTutor]

Trigonometry - Free Formula Sheet: bit.ly/47diggI Trigonometry Video Lessons: www.video-tutor.net/trigonometric-identities.html

[@inebriationconversation4526]

Im cramming for an exam and i just wanna thank you cuz you've consistently helped me learn these ancient evil spells known as trig

[@firstlast5630]

My Trig test is tomorrow I literally want to fucking die... 4 pages of formulas to memorize I am so fucked.

[@TheCyberSatyr]

@@firstlast5630 I think trig is fun lol. Strangely. It's frustrating sometimes, but it's not as hard as some of the shit in algebra

[@firstlast5630]

@@TheCyberSatyr I think it's way harder than Algebra. I made a c on the test and a b in the class btw... not that bad.

[@TheCyberSatyr]

@@firstlast5630 I barely made an A in algebra and am making a B in precal. Mostly because I wasn't prepared for my first exam and my instructor doesnt seem to like me (I never show up because its not mandatory and I feel like hes holding it against me via giving me the review late, wrong answers on the review, etc). Its annoying when you check his answers on the internet and find out that you're right and all of his choices are wrong. Other than my terrible instructor, I'm enjoying the course

[@lopkobor6916]

@@TheCyberSatyr im in calc but im here bc i dont remember some of these identities... boy trig identities sure are fun!

[@realking4918]

cant wait til the semester is over

[@PHILLYMEDIC69]

same dude. I wanna die. Jsut wanna finish my exams

[@sarinarahman2806]

Ahh dont worry.We are in this shit together.Lets show them

[@King-hs9zc]

Same

[@heberdo4639]

same

[@hamzab2404]

same

[@jasonhess9307]

You have allowed me to maintain a 3.7 gpa while working full-time and taking 16 hours a semester. You have singlehandedly taught me more than any teacher I have ever had. Thank you for your kindness and knowledge.

[@thefakebro.s8643]

Deserves the diamond play button

[@insiya4561]

NO!! HE NEEDS THE PLACE OF PEWDIEPIE; the ruby play button

[@articnexas2548]

U know what, I will say a emerald play button

[@lepos4136]

Lol no, he needs a Sapphire play button

[@ethanhayes1123]

@@lepos4136 Lapis play button

[@lepos4136]

@@ethanhayes1123 an average Minecraft lover huh?

[@jojibot9193]

Khanacademy is good but when it comes to triggo this guy is king

[@JJSmalls]

You explained this section better than my textbook did.

[@blackoutemzz2674]

Trust me

[@danielcohen2138]

The textbooks are fucking shite. They don’t explain anything and if you don’t already have a thorough base knowledge on the subject you can forget about understanding the questions

[@sanya5538]

That's hardly surprising.

[@blandinus_8683]

completely agree mate its a chore to even try and make sense of what the text book is trying to explain if you dont already know the topic

[@ngndnd]

@@danielcohen2138 im mad af because these professors want you to spend hundreds on a textbook that you will never even look at. KZbin is my textbook.

[@mariyahyisrael5598]

you are the reason I almost got 100% on my college exam, best teacher ever

[@yesimkhanh9932]

PAST 2 YEARS I HAD WATCHED ALL UR VIDEOS ABOUT MATH AND MY MATH GRADES ARE IMPROVED FROM C TO A, MY SCORE ON MATH SECTION IS 780 AND THIS ALL BCS OF U THX U

[@Wonder.house7]

finally you're speaking in a language I understand...thank you

[@nikkiblair7625]

Thank you for helping me pass precalculus. Your videos are soooooo helpful and I prefer them over the ones given for my course. You're always so thorough and your instructions and steps are clear and easy for me to follow! I literally refer to your videos anytime I start a new lesson in precal.

[@chithomas972]

You really are the organic tutor. You explained everything clearly like it is ABC. Thank you

[@adycarmona8486]

This corona virus ain’t it lmao but we still need that grade 😔✊🏻

[@volarearicelli9286]

aight someone here gets it

[@benji6596]

Lmao nah fr

[@stn2low_adan]

here for the same reason

[@ReversePrimeOFFICIAL]

Just use Mathway

[@brayton6683]

Same here really hard now staying focused and studying and not really having classes but I'm glad we have them to help in this Hardship 😪🔥🔥😫

[@thedragon9326]

Anyone else learning this during the coronavirus quarantine?

[@amogus123-l2h]

bro i hate this class but yea

[@rohanwazir5604]

Yeah

[@milkcabbage1217]

Yooo I hate this 👌😎

[@shortvideolovers6022]

Me

[@nerdbr0-758]

Ye

[@randallmcgrath9345]

No one: O-chem Tutor, "I'm about to save this man's whole career."

[@corncobb2059]

who else here because their teacher can't teach

[@AnnabelleDsouza]

a year later but im here

[@AqeelHareer]

Same

[@CrashMarkerGAMIN]

I am here because my teacher is only teaching pre algebra and I need some thing harder

[@vanesacabillada7071]

me

[@srilakshmikata8360]

Me

[@_TheSplicer_]

THANK YOU THANK YOU THANK YOU. You have helped me so much. My teacher uses the complex vocab and screws me up. I love how you make this so simplistic.

[@GooseWasTakenWasTaken]

Thankyou so much dude, my math teacher really sucks at teaching and this is helping me a lot

[@evanbrant8022]

Inthink what makes this dude so much better than professors at school is becuase he doesn’t mind going back to show you stuff you should have already known or have already been taught. But this dude doesn’t skip steps he goes full detail. Love it, wasting money and time in school. My community college “professor” constantly brags about his real university students, skips steps ALL the time, and then NEVER replies to emails. He’s even having us do assignments on stuff that he says we won’t have time to go over. TF?! Reporting him the second I’m done learning all the material he should have taught.

[@julianrose7295]

Khan Academy who?? Seriously though thank you for these videos!! My textbook is incomprehensible so this is a lifesaver

[@haileymfelt]

Julian Rose factssss

[@elkc4355]

I love this guy. Makes math as simple as studying any other course

[@leah3482]

you have no idea how much you've helped so many people

[@yessielito10]

thank you! this is the only video that helped me out!

[@mukhammedabusuveilim3468]

If I need to review something for my honors calc or hon chem I immediately come here! What a great man!

[@joshuakwan2459]

THANK YOU UR THE BEST! This was so helpful! Saved me cause I was sick and missed this in class.

[@TheTruthIsInTherePodcast]

dude literally helped me go from a d to a a by the end of the year, your literally saving my butt!!!!!!!!!!!!

[@jaeen7665]

JG coming through in the clutch once again. Your video is helping people nearly 6 years after posting.

[@fbloorg6140]

I swear I can understand the lesson *More Clearly* watching this dude's videos, than listening to my teachers Lectures.

[@nomanrafique1]

You are such an excellent teacher, Than you.......

[@uldaricoloayon440]

Your so organic no chemical its pure and helpful

[@arrivedercilol1599]

Thank you so much I literally won't survive without you.

[@raqad4642]

You saved my life although my instructor kept giving us complicated questions, she kept tricking us. I wouldn’t pass the class without you 🤟 thanks 🙏

[@darian5672]

The two triangles actually helped me to understand the unit circle so much better. Thank you!

[@zealopez7958]

I just moved to a new country and I’m wayyyy behind u just taught me in twenty minutes more then my professors have in weeks from the bottom of my heart I thank u

[@LukePaciocco]

14:43 .... I've coined this phenomena as "Einstein fog"... when you're so used to solving exponentially more intricate and tedious mathematic equations, only to return to something like basic division - it takes a moment for your brain to recalibrate to such a basic way of thinking. I noticed from the brief pause and "uhh". Einstein himself was incredibly guilty of this to a point where he'd even forget elementary equating.

[@azimuth011]

I can relate to this, a lot. I can solve a lot of complicated equations without calculator, only to use calculator for simple and basic operations like addition

[@LukePaciocco]

@@azimuth011 I was INSANELY in the zone studying, super caffeinated up, and being my typical over-analytical self when I wrote that comment, hahaha. So funny coming back to read it. I'm glad you could relate, Kira. Because regardless, this experience is absolutely a real thing! 😁

[@quantumwave1036]

I won't lie there have been times where I have run simple addition into my calculator because I wasn't so sure of such a simple answer.

[@samadhisandunika302]

Trigonometry lesson so hard to me but after watch your video. I could solve my problem thank you so much.👍😀

[@rafaeledits8419]

Hello! Just a question. For 17:07, can I just choose between any two angles in the unit circle that would sum up to 345 degrees? Or is there some basis/criteria that is needed to be followed? Thanks in advance.

[@machmacker]

they have to be angles that you know of from the unit circle, you can do 300 and 45, 210 and 135, etc. but it wouldn't be helpful to use 200 and 145 since we don't know those from the unit circle

[@sethnary3974]

At 10:44 is there anything wrong with doing tan(60-45) or should I learn to use the lowest possible combination for good practice?? Just wondering if there is any difference?

[@raymondhenneh3521]

Anytime I come to learn online I search for you first Best teacher

[@TheATLTengu]

Kinda funny to see that even during quarintine, we are all still struggling to learn this the same as when we were in school.

[@dormi_torio]

It's not like quarantine made me any smarter

[@RumpelStiltskindarkone]

@@dormi_torio it should have made us smarter but we're to busy tryna understand this useless shit

[@tmann986]

Wow! I did not think of converting the radian into degrees! That helps so much!

[@vladimirmoravek2646]

[15:35/21:44] Mark, tan(23pi/12) = tan(2pi-pi/12) = tan(-pi/12) = -tan(pi/12) = (3)^(1/2) - 2. (per previous example)

[@MaryamAliyubaba]

Thank you, you have helped me a lot today thank you so much

[@MilesLeslie]

Who else is learning this right now in Math? You got this!!❤

[@amagiyaisaiah692]

Thanks this among the course content for maths 101 am doing.I'm a student from a Nigerian university 🇳🇬

[@TheCyberSatyr]

If you memorize the unit circle, you always have access to it lmao. Cant wait for calc 1

[@Joeydoesmedicine]

I guess you are just going to teach me every subject, lol I watch your chem videos for gen chem 2

[@xandertroche44]

You’re so talented. Thank you man, may God bless you abundantly!!

[@danelmasambo2457]

Thanks for having good lecturer like you.u r helping many.⛄⛄⛄⛄⛄⛄

[@noneofyourbusinessboy7118]

Test two is coming up for me and the quarter is almost over. I need some motivation

[@ignatiusmbo1769]

Prayer is the keyy

[@deathraydave]

We got this bois

[@elhadmuharemovic5870]

Thank you Mark Whalberg

[@2094-o7f]

Marky Mark and The Funky Math

[@daviddelaney363]

Yes am learning this during the pandemic. Eventually will conquer Maxwell’s equations. .

[@clintonoraka8946]

Anyone notice how he repeats concepts relating to the topic he's teaching on all his videos regardless. Unlike telling you to go watch it on another of his videos?

[@seaamoeba3343]

this man just changed the ENTIRE game

[@labanmupendah4222]

Excellent explanation. This is the topic in which I have been facing challenges for the past 3years. Thanks very much for your help 🙏

[@BillWilliams-o6v]

Sir I honestly appreciate your teaching🤧🤧 ever since I subscribed I've improved significantly in mathematics and chemistry...thanks a lot 😊😊

[@lucyginzel]

bro ur a lifesaver

[@ladybugk194]

My English is not very good, but mathematics never and never knows the language, I understood the subject because it is international. Thanks for enlightening me.

[@drewtolar1318]

Your videos always help if I don't understand what's going on. Thank you

[@darelantonio9114]

Wow thanks for the lesson , I have been struggling with the radian part

[@mathsaplus932]

God bless you Sir you the one making my e-learning effective

[@KeepthefamilycloseByDrak-wd4jd]

when I'm lost I always find my way back to you - gandalf

[@nerdybird5764]

Dude thank you so much. This is helping me pass my classes

[@hueeeeeeeeee]

This is the Shaw shank redemption of math problems. It’s beautifully done.

[@okiemuteabe3331]

Ur such a life saver

[@linuxsport]

This channel trig videos are on point.

[@laolangewilhelmina8851]

Why my teacher can't teach like this.😏.. you deserve a reward Sir 🙏

[@dewmiranasinghe4039]

Bro is saving my life

[@beatricecajetan2632]

aaaah,i love this channel,thank you!!! always coming thru for folks like myself.

[@JunchenDesigns]

saved my life! thank you!

[@lebronjames726]

Yes all I had to do was suck it up and click on one of the videos that was over 6 min I've got it! I UNDERSTAND

[@lebronjames726]

I only needed the first 2 and a half minutes 😔 I wasted my own time tryna find the easy way out

[@alant.j5030]

YOU MAKE IT LOOK SOOO SIMPLE . THANK YOU SIR ! AM GETTING A DISTINCTION

[@catvyhuynh7359]

Thank you so much, your video will be my life saving in my test. Your explanations are not only simple and but your math presents are also easy to understand. I hope you would make more of these useful videos to help everyone with their math problems. Love your video :)

[@chrislee7325]

This whole 7.1, 7.2, 7.3, 7.4, 7.5 is stupid. It looks very easy, but when I start to do it this makes me crazy. WT

[@khwahishjain8568]

sameee

[@lemonlizard1]

for anyone who might be confused why cos(45) and sin(45) are √2/2 instead of 1/√2 - it's because a denominator can't be a square root. So the whole fraction is multiplied by the square root. This will make the denominator a whole number without changing the actual value of the fraction so if you start with the fraction 1/√2 numerator: 1 * √2 = √2 denominator: √2 * √2 = 2 you end up with a fraction of √2/2

[@SAIFKHAN-sn9su]

you’re a lifesaver fr🙏🏻

[@nailahhenderson5672]

It was very hard for me to memorise the SOH CAH TOA surd form from the circle but with the triangle is wayyyyyy easier. I love your channel.

[@kennethhowell5291]

You are the best! Thank you very much!

[@lord_nin0]

this dude is a genius

[@shivanijally2985]

i cant thank you enough never stop this hare krishna

[@Jker_-mr8vg]

For some reason I leanred more here than the past two days in school.

[@Triferus]

Teaches better than my professor who can't even speak English

[@jamcaimen8768]

Thank you for helping me with kumon

[@johnhemenway8202]

I never thought I'd learn trig from Mark Wahlberg. Thanks Marky Mark.

[@Jojo-pw8wp]

He does sound exactly like him. lol

[@casscassmc]

Amazing wonderful beautiful it’s slow clear thorough great video to watch after a breakdown

[@ejeguono1254]

Great Job... May God bless you.

[@mohammedalmikail420]

Thank you so much!! helped me a lot

[@gracediama6302]

Mohammed AlMikail so you going through quarantine to huh 😭

[@mohammedalmikail420]

@@gracediama6302 yep :( and daily math quizzes aren't helping lol

[@brayton6683]

I'm so glad school are opening soon this staying at home not really having classes is killing me . I'm really losing focus at the task at hand which is school and studying like staying at home just makes me more lazier 😥

[@ruhi4985]

thanks man you saved my maths grade

[@corey333p]

I don't get why the length of the hypotenuse at 5:00 does not equal 1. The hypotenuse = 1 on the unit circle, correct?

[@gabnotofficial5880]

In 17:07, can i write 135 and 210? Instead of 120 and 225?

[@Fatimah22187]

1:22 How do we get to know that either 30 is A and 45 is B?

[@rihyanny]

I don't think it matters at all since 30+45=75 & 45+30= 75 the answer will still be positive. Unlike if you are given a negative degree e.g. -15 then A should be 30 and B should be -45 because 30-45 =-15

[@Fatimah22187]

@@rihyanny thanks, 🙏 got it

[@mitchellfamily90]

fantastic explanations EVERYTIME!!

[@deranged8312]

Damn this vid rly came up in my feed after my test 😭

[@joyflanagan7722]

Finally a helpful tutorial

[@lowopelumi207]

Thank you. This is helpful 🥺❤️

[@TorticelYT]

This was very helpful thank you!!

[@chandlercopenhaver5659]

i owe you my life

[@zamanmackan97]

Nice and clearly good explained 😁,thanks to you

[@weirdguy320]

What's difference between identity and fomula ? N difference between trigonometric identities and trigonometric formula ?