Use the definition of the derivative and the trigonometric identity cos (x + h) = cos x

Question:

Use the definition of the derivative and the trigonometric identity

cos (x + h) = cos x cos h - sin x sin h

to prove that d/dx (cos x) = -sin x.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

Calculus Early Transcendentals

ISBN: 978-0321947345

2nd edition

Authors: William L. Briggs, Lyle Cochran, Bernard Gillett

Question Posted: