defence exam Army Havildar SAC Mock Test Series 2025 Mathematics Differential Calculus Applications of Derivatives
Comprehension Passage
Direction : Consider the following for the items that follow :
Let f(x) = cos2x + x on [-π/2, π/2].
What is the greatest value of f(x)?
1
\(\rm \frac{\sqrt3}{2}-\frac{\pi}{12}\)
2
\(\rm \frac{\sqrt3}{2}+\frac{\pi}{12}\)
3
\(\rm \frac{\sqrt3}{2}+\frac{\pi}{9}\)
4
\(\rm \frac{\sqrt3}{2}+\frac{\pi}{6}\)