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### Section 3-5 : Derivatives of Trig Functions

4. Differentiate $$f\left( x \right) = 2\cos \left( x \right) - 6\sec \left( x \right) + 3$$ .

Show Solution

Not much to do here other than take the derivative.

$f'\left( x \right) = - 2\sin \left( x \right) - 6\sec \left( x \right)\tan \left( x \right)$