Which one is the derivative of \( log\left(cosh \frac{x}{a}\right) \) ? A) \( \frac{1}{a}tanh\frac{x}{a} \) B) \( tanh\frac{x}{a} \) C) \(…
Class 12 Mathematics · 2083 · Solved Question with Answer
Which one is the derivative of \( log\left(cosh \frac{x}{a}\right) \) ?
A) \( \frac{1}{a}tanh\frac{x}{a} \) B)\( tanh\frac{x}{a} \) C)\( \frac{1}{a}sech\frac{x}{a} \) D) \( \frac{1}{a}coth\frac{x}{a} \)