`y = a^3 + cos^3(x)` Find the derivative of the function.

Textbook Question

Chapter 3, 3.4 - Problem 14 - Calculus: Early Transcendentals (7th Edition, James Stewart).
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gsenviro | College Teacher | (Level 1) Educator Emeritus

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Assuming 'a' is independent of x, since nothing else is given.

`y' = d/dx (a^3) + d/dx(cos^3(x))`

`= 0 + 3*cos^2(x)*d/dx(cos(x))`

`= -3 sin(x) cos^2(x)`

hope this helps

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