`f(x) = sec(x)` Find the second derivative of the function.

Expert Answers
hkj1385 eNotes educator| Certified Educator

`f(x) = sec(x)`

`f'(x) = sec(x)tan(x)`

`f''(x) = sec(x)*sec^2(x) + tan(x)*sec(x)tan(x)`

`or, f''(x) = sec(x)[sec^2(x) + tan^2(x)]`

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