# Derivative of ln(cos(x))

## Derivative of ln(cos(x)). Simple step by step solution, to learn. Simple, and easy to understand, so dont hesitate to use it as a solution of your homework.

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## Derivative of ln(cos(x)):

(ln(cos(x)))'(1/cos(x))*(cos(x))'(1/cos(x))*(-sin(x))-((cos(x))^-1*sin(x))`
The calculation above is a derivative of the function f (x)