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Single Variable Calculus

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Moderate

Implicit Differentiation of Cosine

SVCALC-7LNDRL

Find $y'$ for the function:

$$y=\cos(x+y)$$

A

$\cfrac{\sin(x+y)}{1- \sin(x+y)}$

B

$-\cfrac{\sin(x+y)}{1+ \sin(x+y)}$

C

$-\cos(x+y)$

D

$\cfrac{\sin(x+y)}{1+ \sin(x+y)}$