" (ii) "cos^(-1)sqrt(cos x)

cos^(-1)(sqrt(1+cos x)/2)

(d)/(dx)cos^(-1)sqrt(cos x) is equal to

Derivatives of y = cos^(-1) sqrt((cos 3x)/(cos ^(3) x)) with respect to x , is

Differentiate cos^(-1)sqrt((1+cos x)/(2)) w.r.t. x.

(d)/(dx)(cos^(-1)sqrt(cos x)) is equal to (a) (1)/(2)sqrt(1+sec x)(b)sqrt(1+sec x)(c)-(1)/(2)sqrt(1+sec x)(d)-sqrt(1+sec x)

If y=cos^(-1) sqrt((1+cos x)//(2)),"then " dy/dx=

arctan^(-1)((cos x)/(1-sin x))-cos^(-1)(sqrt((1+cos x)/(1-cos x)))=(pi)/(4),x in(0,(pi)/(2))

If y= cos^(-1)sqrt((cos3x)/(cos^3x)) and (dy)/(dx)=sqrt((k)/(cos2x+cos4x))( sinx gt0) then k is