Question #44491
1 Answer
Feb 23, 2017
This is a product of three functions.
Explanation:
I use the product rule in the order:
(The derivative of a product is the derivative of the first times the second, plus the first times the derivative of the second.)
For three functions, we have
= u'vw+u(v'w+vw')
= u'vw+uv'w+uvw'
For four functions
In this question
so,
= cos theta sin theta + theta( cos^2 theta - sin^2 theta)
The quantity in parentheses is equal to