Sum and Difference Identities of Sine and Cosine

[@TheOrganicChemistryTutor]

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I've understood more from this guy than my current math teacher

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MR. Organic Chemistry Tutor, thank for a classic topic and master selection of Sum and Difference Identities of Sine and Cosine.

[@littlechemist]

Every video of this Chanel inspire me to fullfill my dream. As I want to be a chemist.

[@versacemilk]

How are things going brother? I’m struggling with trigonometry

[@littlechemist]

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[@sanopann1896]

can you add or subtract the radicals ???? if not why this cancel at 8:28

[@ワˬワ]

-a + a = 0, a in this case would be (sqrt3) / 4 this is the same as -1 + 1 = 0

[@franciskwaw294]

In fact you're a borne teacher. May God bless you.

[@FranciscaVictoria-c9s]

U are too Good Man!More Inspiration 👍

[@sinistersharpie3441]

8:05, I'm not understanding why the 1/2 became negative? Any way to find the negative by putting it into a calculator? Otherwise, it just feels like guess work. And where did the cos go?

[@bravcoder]

that's the value of the function

[@aserawi5966]

Very help full ... bro pls make more solutions of resolving of vectors pls ..

[@nelisasiko]

Thanks for all the help Gonzalez🔥🔥

[@generalgrievous3731]

His name is Gonzalez?

[@nelisasiko]

@@generalgrievous3731 yes Julio Gonzales

[@thescientist6486]

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[@Digitalproductsacademy]

Hi

[@ericamusonda8082]

I am having a bit of trouble following you on the evaluation of the special angle solutions for the first question.... Sin 45degrees is actually 1/(root of 2) but its stated (root of 2)/2 where am i going wrong? cause i have rechecked the triangle multiple times P.S cant find the symbols lol

[@ChelsiBerglund]

You have to rationalize the equation. You can't put a square root in the denominator, so you square both the denominator and numerator by the square root. 1/√2 = (1*√2)/(√2*√2) = √2/√4 = √2/2 since √4=2. Hope that helps! :)

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[@adriankepler5254]

Thought I was hopeless... Thanks!

[@tarikhamir]

thank you very much

[@damiantorres178]

how come at the end question with tan you cant do 45 degrees-30 degrees to get tan 15 degrees?

[@DodgeThis]

What about something like sin285 degrees?

[@Digitalproductsacademy]

Can you do vectors please

[@kimanhchung8372]

Thanks

[@Solbashio]

thanks bruv

[@maddelynatwater5799]

bruh, am i just a silly little goose ?? or what? i thought quadrant 2 was negative...【・_・?】15:12 got me confused lol (rest of the video was very helpful tho)

[@lilacdaven]

X is negative (for cosine) and y is positive (for sin), since cos in q2 is going left, its negative. Sin goes up on the y axis, so positive

[@SimonMutiso-c6h]

but have not understood why sin 45 is root 2 over 2

[@mxtjo_6083]

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[@DavidRoble-d8b]

ayoko na

[@Digitalproductsacademy]

Can you do vector

[@lukechang1037]

Worms

[@mashihiro]

Was here mehehe

[@mashihiro]

This will be relevant soon I'm sure of it

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First view 🌟

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[@Ashru_Moo]

Sin of -30 is -1/2 btw

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Hahaha it sounds like you are in the shower and decided to teach math while your at it.

[@vi.chor_uz]

Early!

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[@Digitalproductsacademy]

Can you do vector

[@Digitalproductsacademy]

Can you do vector