Question

A function $f\left(x\right)$ is monotonic increasing or decreasing according as $f^{\prime }\left(x\right)>0\text{or}{f}^{\prime }\left(x\right)<0.$ Let us consider a function $f\left(x\right)={\int }_0^x\{2\sqrt{2}{\sin }^{2}t+(2-\sqrt{2})\sin t-1\}dt$

$0<x<2\pi .$ Then

• A. b
• B. c
• C. a
• D. d

Answer 1

The correct option is C a

solution