Homework Help: Calculus (Derivatives)

Posted by Mishaka on Monday, November 7, 2011 at 6:12pm.

Using the product rule, find the derivative of the following function:
(x^1/2 cscx sinx).

Calculus (Derivatives) - Steve, Monday, November 7, 2011 at 8:14pm
First off, csc * sin = 1
So, y = √x

However, if you insist on doing it the hard way

y = √x cscx sinx
y' = 1/2√x cscx sinx + √x(cscx sinx)'
= 1/2√x * 1 + √x(-cscx ctnx * sinx + cscx cosx)
= 1/2√x + √x(-ctnx + ctnx)
= 1/2√x

same answer

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