Use the derivative formula for sin x and the identitycos x = sin 2 xto obtain the

Chapter 2, Problem 72

(choose chapter or problem)

Use the derivative formula for $\sin x$ and the identity

$\cos x=\sin \left(\frac{\pi}{2}-x\right)$

to obtain the derivative formula for $\cos x$.

Equation Transcription:

$sin\ x$

$cos\ x=sin\ \left({\frac{\pi{}}{2}-x}\right)$

$cos\ x$

Text Transcription:

sin x

cos x=sin (pi/2-x)

cos x

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