Let `f(x)= cos x sin 2x ` then choose the best option :

Let f(x)=cos x sin2x then

Let f(x)=cos x sin2x, then

Let f (x)= cos x+ sin px be periodic, then p must be :

Let f (x)= cos (px)+ sin x be periodic, then p must be :

Let f(x)=e^(cos^-1sin(x+pi/3)) , then

"Let f(x) "=|{:(cos x" " sin x" " cos x),(cos 2x" "sin 2x" "2cos 2x),(cos 3x" "sin 3x" "3cos 3x):}|" Then find the vlue of "f'(0) and f'(pi//2).

"Let f(x) "=|{:(cos x" " sin x" " cos x),(cos 2x" "sin 2x" "2cos 2x),(cos 3x" "sin 3x" "3cos 3x):}|" Then find the vlue of "f'(0) and f'(pi//2).

Let f (x) = sin x - cos x. Then the value of lim _( x to pi/2) ""(f (x)- f ((pi)/(2)))/(x - (pi)/(2)) is