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Find the derivative of y= xcos(y)?
I have been trying to figure this out for a while and I can't figure it out, could anyone help me please?
it tells me y'=?
1 Answer
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- GeronimoLv 79 years agoFavorite Answer
You need to use implicit differentiation.
——> Note: d/dx{ cosy } = - siny • (dy/dx) = - ý • siny
y = x • cosy ... use the product rule, where: dy/dx = ý
ý = - x ý siny + cosy ... now solve for ý
ý + x ý siny = cosy
ý • (1 + x siny) = cosy
ý = ( cosy) ⁄ (1 + x siny)
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