int_(0)^( pi)cos^(5)xdx=0

int_(0)^(2 pi)cos^(5)xdx=

int_(0)^( pi)cos^(3)xdx=

Examples: int_(0)^(2 pi)cos^(5)xdx

Prove that, int_(0)^(pi)cos^(3)xdx=0

int_(0)^(2 pi)cos^(7)xdx

int_(0)^(2 pi)cos^(4)xdx

int_(0)^( pi)sin^(5)xdx

If a, b, c are the values of int_(0)^(pi//2)cos^(5)xdx,int_(0)^(pi//2)cos^(7)xdx,int_(0)^(pi//2)cos^(9)xdx then the descending order of a, b, c is

Evaluate: I=int_(0)^(2 pi)x*cos^(5)xdx

"int_(0)^( pi/2)cos^(n)xdx