`f(x) = -x + tan(x)` Find the derivative of the trigonometric function.

Textbook Question

Chapter 2, 2.3 - Problem 43 - Calculus of a Single Variable (10th Edition, Ron Larson).
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hkj1385 | (Level 1) Assistant Educator

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Note:- 1) If y = tanx ; then dy/dx = sec^2(x)

2) If y = x^n ; then dy/dx = n*x^(n-1)

Now, 

`f(x) = -x + tanx`

`f'(x) = -1 + sec^2(x)`

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