Thread: Differentiation of trigonometry equations
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Old June 27th, 2009, 04:49 PM
greghunter greghunter is offline
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Quote:
Originally Posted by Amer View Post
\frac{d}{dx}(cos(f(x)))=f'(x)(-sin(f(x)) chain rule

\frac{d}{dx}(cos(x^2))=2x^2(-sin(x^2))

\frac{d}{dx}(cos(5x-1))=\frac{d}{dx}(5x-1) (-sin(5x-1))=5 (-sin(5x-1))
thanks, i don't think i've been taught the chain rule yet
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