Question

If y = x + tan x, then value of $\frac{d^2y}{dx^2}$ at $x= \frac{\pi}{4}$ is:

• A. 1
• B. 2
• C. 4
• D. $2 \sqrt{2}$

Answer 1

Answer: (C)

4

Answer 2

The correct option is (C): 4