11th Class
Mathematics
Sample Paper
Mathematics Olympiad - Sample Paper-5
question_answer
The derivative of \[\mathbf{se}{{\mathbf{c}}^{-\mathbf{1}}}\left( \frac{-1}{2{{x}^{2}}+1} \right)\]with respect to \[\sqrt{1-{{\mathbf{x}}^{\mathbf{2}}}}\]at \[\mathbf{x}=\frac{1}{2}\]is equal to: