Hi, for the life of me I cannot figure this one out.

Find the derivative of .

This is what I tried to do:

The answer in the book is .

How the **** did they get that? Thanks.

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- February 8th 2013, 07:43 AMKhanDiscipleTrigonometric Differentiation Problem.
Hi, for the life of me I cannot figure this one out.

Find the derivative of .

This is what I tried to do:

The answer in the book is .

How the **** did they get that? Thanks. - February 8th 2013, 08:01 AMPlatoRe: Trigonometric Differentiation Problem.
- February 8th 2013, 08:36 AMKhanDiscipleRe: Trigonometric Differentiation Problem.
Thank you Plato. The answers appeared completely different to me, and in the future I will try to use the correct notation.