Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test 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
More than one of the above
5
None of the above