defence exam ITBP (Telecommunication) Head Constable Mock Test 2024 Mathematics Differential Calculus Differentiation by substitution
What is the derivative of the function f(x) = etan x + ln(sec x) – eln x at \({\rm{x}} = \frac{{\rm{\pi }}}{4}?\)
1
e/2
2
e
3
2e
4
4e