Let f(x)= -6 cos x + 6 tan x Find ‘(x) Find ‘(π/3) My results were the following: f’(x)= 6sin(x)+6sec^2(x) f’(π/3)= I don’t understand how the correct result was 29.196152 -Please explain step by step.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 80E
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Let f(x)= -6 cos x + 6 tan x Find ‘(x) Find ‘(π/3) My results were the following: f’(x)= 6sin(x)+6sec^2(x) f’(π/3)= I don’t understand how the correct result was 29.196152 -Please explain step by step.
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