Mathematics - Definite Integration Question with Solution | TestHub

Number of solution of the equation $\frac{\mathrm{d}}{\mathrm{dx}}{\int }_{\cos \mathrm{x}}^{\sin \mathrm{x}}\frac{\mathrm{dt}}{1-{\mathrm{t}}^2}=2\sqrt{2}$ in $[0,\pi ]$ is -