`int_(-pi/2)^( pi/2)sqrt(cos x-cos^(3)x)dx=`
(A) `3/4`
(B) `4/3`
(C) `3/2`
(D) `2/3`

Evaluate int_(-pi//2)^(pi//2) sqrt(cosx-cos^(3)x)dx .

int_(pi)^((3pi)/2)(sin^(4)x+cos^(4)x)dx

int_(pi//6)^(pi//3)cos^(2)x dx=

if int_(-(pi)/(2))^((pi)/(2))(sin^(3)x+cos^(3)x)dx

int_(-pi//2)^(pi//2) (5sin^3 x+8sinx+4 cos^2x) dx

int_(0)^(2 pi)(cos x)/(sqrt(4+3sin x))dx

int_(pi//4)^(3pi//4)(dx)/(1+cos x)=

int_(0)^((pi)/(2))(4-3sin x)/(4+3cos x)dx

int_(-(3pi)/2)^(-pi/2) {(pi+x)^3+cos^2(x+3pi)}dx is equal to (A) pi/4-1 (B) pi^4/32 (C) pi^4/32+pi/2 (D) pi/2