cos(3x) in terms of cos(x)

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cos(3x) in terms of cos(x),
write cos(3x) in terms of cos(x), using the angle sum formula and the double angle formulas,
prove trig identities,
verify trig identities,
simplify trig expressions,

blackpenredpen

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Thanks. My teacher didn't even explain this and gave us hw involving it bruh

MurunGD

THANK YOU! You are so good at explaining this stuff.

shehzadk

Love from India very good explanation sir🇮🇳

Dada_singh

I had this on a 5 minute test, is that even fair?

icewlf

really helping out in exam week, cheers mate

agustinvicencio

Sir you are really a good explainer I love this video ❤️

sabitaswain

Thanks, you showed me a formula I didn't know
it helped a lot because people couldn't explain

backupjester

Oooh, cuático, primer video que veo en inglés (no soy muy buena) y entiendo mucho mejor que otros en español, además de ser corto y preciso xD, te ganaste un buen like ❤

aylinefariasrivera

Parabéns!!! Adorei o manejo das canetas!!!

DelsonFilho

at (2sinxcosx)sinx, why isn't sinx distributed to cosx as well ??

youbuusta

that was actually very helpful, thanks :^D

dinchik

Thanks for reminding me of the Double Angle Formula!

valerieroberts

Thank you so much! I feel much more confident for my test

caitlyngilliam

omg that was awesome, thank you so much for the help

ericatan

I love this formula. I just used it to find the period of "cos(12x)•cos(4x)" and thought cos(a±b)=cosacosb-sinasinb formula would take a long time

coffee_grounds

thank you so much it really helped me!!!

Rico.colinat

Thank you so much!! You've explained it super well!!!!

evaacanhb

What? My teacher should have gone over this whole thing in class because it's showed up several times on the homework and my goodness. That looks kinda simple but look at that monster. Just a whole thing.

Yipper

Thanks to u I got it right on my hw, thanks keep up the good work😏👍

oswynherrera

U should do more trig identities <3

inox

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