JEE Main & Advanced
Mathematics
Differentiation
Question Bank
Numerical Value Type Questions - Differentiation
question_answer
If \[f\left( x \right)=\cos \left( {{x}^{2}}-2\left[ x \right] \right)\]for \[0<x<1\]and \[f'\left( \frac{\sqrt{\pi }}{2} \right)=-\sqrt{\frac{\pi }{k}},\]then find k.