engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Differential Calculus Differentiation of Implicit Functions
यदि f(x) = cos x . cos 2x . cos 4x . cos 8x . cos 16x . cos 32x है, तो f’(π/4) क्या है?
1
√2
2
1/√2
3
2
4
1/2