`int_(1)^(pi)x+cos xdx`

" 4."int_(0)^( pi)x cos xdx=-2

STATEMENT 1: int_(0)^( pi)sqrt(1-sin^(2)xdx)0 STATEMENT 2:int_(0)^( pi)cos xdx=0

" (3) "int_(x=0)^(pi/2)cos xdx

Evaluate : int_(0)^(pi) cos^(2)x.dx

If f:[0,pi]rarr R is continuous and int_(0)^( pi)f(x)sin xdx=int_(0)^( pi)f(x)cos xdx=0 then the number of roots of f(x) in (0,pi) is ...

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

int_(0)^((pi)/(2))x cos xdx

int_(0)^((pi)/(4))x cos xdx

int_(0)^((pi)/(4))x cos xdx

int_(0)^((pi)/(2))cos x cos3xdx