Integral of cos^5 x

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I'm taking calculus 2 right now and this really helped!

MrCalvinsmylie
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Why do you film your face with 16:10 and your hand with 4:3 ratio?

ArtemRomanov
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Cool you made some new videos thanks Dr. Tisdell

Matchbox
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thnku so much Dr. it really helped me....

jaspreetkaur
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wow i had no idea that was a identity was never shown that in class, is there an identity like this for tan and sec?

dudewtf
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haha wow turns out it was an identity xD thanks for clearing that up chris!

ILikeWeatherGuy
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am I the only person who finds it easier to use imaginary numbers

cos^5(x) => ((exp(ix) + exp(-ix))/2)^5 => (exp(i5x) + 5exp(i3x) + 10exp(ix)+ ...)/32 =>  (cos(5x) + 5cos(3x) + 10cos(x))/16

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