Solving simple trig equations

[@justkrimzz3823]

Thank you so much for this video!! I have searched for roughly an hour watching 20 or so videos, and none of them are as straightforward as this one!!

[@amarhassenmohammednur4529]

Me too

[@pronk4321]

I missed a week's worth of class on this, u are a life saver!

[@VyPham-ki4lp]

Thank you! I'm struggling so horribly with trigonometric equations. My class is onto the difficult ones and I barely understand simple ones... Time to teach myself what on earth my teacher is trying to teach me!

[@ikerjimmy2696]

I dont mean to be off topic but does anybody know of a trick to get back into an Instagram account..? I somehow forgot my password. I love any tips you can offer me!

[@SHIV-uw2zj]

@@ikerjimmy2696 you could reset your password

[@macktapp3389]

Great video. I graduated highschool a few years ago, but i never did good at trig. One of those things they just ignore and then you move on. And just like that, in a few minute video, i have a far greater understanding of this. Thank you. You must be a good teacher

[@spaghetboi5542]

Thank you Brandon! I come from a school in Italy and for some reason here (also online) they make the process look so much more complicated.

[@BrandonGrasley]

I'm glad I could help!

[@CPWG_Jawrence]

I’m in the same boat now :)

[@Kam16665]

I don't know if you see this,sir. I gonna say you've saved my live!

[@Kaitwof]

Thank you so much! I've been so confused in my pre-calc class and my professor doesn't teach us anything at all so this made me understand so quickly!

[@jeremyfisher8250]

Thankyou for not draining my soul and keeping it to the point

[@BryerArtStudios]

Omg thank you so much for this video 🙏 I was sick the day my teacher taught us the lesson and I had no idea what I was doing 😭😭

[@RandyVidz]

Thank you, you gave me a big aha moment when u mentioned that the inverse only goes to 180. But you can always take that number and do - and then 360 and then you get a positive value?

[@jonahrangel2013]

Simple vid clear and simple 👌

[@iradukundafrank9021]

So helpful l appreciate sir, God bless you

[@uzaira9088]

I finally understood this on the final day on exams,hail to the professors on yt OH HAIL

[@ndounaben]

Keep people with relevant videos, watch how to solve trigonometric equations, part 2 of 4 : kzbin.info/www/bejne/rHy2eGSqi8efhLM

[@BrightwellSianyama-rr3bm]

How do we solve this equation 5cosphiter=-3

[@DuraDeRapper-ng2kw]

Trig equations are well explained here❤💯

[@eshalumair2584]

Bro I’m not aloud using a calculator

[@lakshanbandara1619]

Simple and on the point

[@yourriseon7]

Sorry sir. Can I ask u. How we can solve the question if it looked like this: 3 sin (teta + 30°) = 7 cos teta Thank you

[@BrandonGrasley]

You need to modify the sin() function using an identity: en.wikipedia.org/wiki/List_of_trigonometric_identities#Angle_sum_and_difference_identities

[@yourriseon7]

Thank you sir

[@ruthchambers6474]

Great explanation 😁

[@riydh274]

I study in SAUDI ARABIA and you did me a favour , THANKS 😁

[@Nawalsamer04]

Same

[@Nawalsamer04]

It’s my fault the teacher teachers I play and now I am almost gonna fial my exam

[@cottonmint7880]

I am sorry i am really slow but can someone pl explain to me why we subtract 60 from 360? Why not 180?

[@sawdamacalin807]

Cos is + in quadrant 1 and 4 so to find quadrant 4 u have to subtract 360 from the angle u have And first u have to learn reference angles that would help u alot

[@DelibyTebulo]

Thank you for this video I've learn something new

[@augustineukpeyogwa6075]

Can we solve sin{3x}=1-cos{4x}?

[@timone15]

Thank you this was very helpful!

[@Hanky3]

Why would the 217 not be negative if it is in the 3rd quadrant?

[@BrandonGrasley]

The angle in Standard Position in the third quadrant is positive (37° past 180°). The *sine* of the angle is negative because it's in the third quadrant, but the angle itself is positive.

[@BrandonGrasley]

In case it's helpful, I just made a new version of this video. It's here: kzbin.info/www/bejne/qJeuh4mMec-VhtU

[@Hanky3]

@@BrandonGrasley Yes! Thank you!

[@Jason-Goat17]

Thank you so much ! This really helps !

[@paromitaroy5861]

Why is it 360-60 instead of 360-2(60)

[@wholeloteditz2228]

Why 180+37?

[@dareenal-menaifi2430]

What do I do if it’s csc?

[@BrandonGrasley]

If you have something like csc(x)=3.7 rewrite it as sin(x)=1/3.7 And then solve. All of the secondary functions cans be written as primary functions.

[@dareenal-menaifi2430]

Brandon Grasley ohh okay thank youu💜

[@raedkorman]

your video saved me

[@haidyashmawy3867]

i couldnt understand why you did -180 and 180 in the last question can anyone explain why?

[@BrandonGrasley]

I was referring to how a calculator's inverse functions work. They don't give answers like 290⁰. Instead, they would give an answer like -70⁰. If you need a solution between 0⁰ and 360⁰ you need to convert the calculator answer into the right interval (generally by adding 360⁰ to the negative angle).

[@haidyashmawy3867]

@@BrandonGrasley ohhh okay thank you so much!

[@torinmcmaster4849]

Great video! Perfect

[@martin400]

What about tan..?

[@kris-yg9om]

same logiv you use arctangent

[@MrTomyCJ]

For tan(x), arctan(x) gives you a solution (let's call it X) and then all other solutions are X + n*180º, where n is any integer.

[@Dozee]

Thank you so much!

[@amarhassenmohammednur4529]

Thank you very much

[@jp9523]

What if u dont have calculator... For entrance exams

[@BrandonGrasley]

I don't know the requirements for your exams, but I would expect people to know the special angles: kzbin.info/www/bejne/i4u6oqWQaqaof7M

[@aztech8460]

Thank you 🙏🏼

[@nicholaspacheco8922]

holy savior batman

[@densie_____]

Thank you

[@strangeman4088]

thanks ❤

[@hussainbaqar1656]

Really helped

[@BrandonGrasley]

I'm glad!

[@hakimihkm9005]

IB GANG

[@saminamubeen6731]

Thanks alot

[@NeoRampai-h5b]

For me to remember the ASTC diagram I used to substitute it as All Stupid Teachers Complain😅

[@Ggbaggio]

thank you omg

[@Shaquille69355]

How would you do this if you couldn't use a calculator And nice video👍

[@BrandonGrasley]

For most angles you really need a calculator. For certain angles (30°, 45°, 60° and their multiples) the ratios are nice numbers and you can memorize them.

[@Shaquille69355]

@@BrandonGrasley thanks I'm learning about the unit circle but just wondered if you could get other numbers than just those. But thanks anyways

[@jp9523]

Yup... I want to learn without calculator... I so someone using the triangles of 45,45 and 30,60

[@purplehaki7871]

lol I have the same calculator as you:)

[@koustavmondal7521]

CAST.How about ASTC-ALL STUDENTS TOO CUTE

[@nicolea997]

But how do you do this when it’s in radians 😭😭😭

[@kris-yg9om]

Nicoe Atala same thing

[@tess3232]

Yea… I’m dropping out

[@Yungaaaa]

Im cooked

[@amirdivan5799]

Thank you so much