int(dn)/(s+3cos^(2)n)

I=int(sinn)/((1-cos n)^(2))dn

int x^(3)cos x^(4)dx int nx^(n-1)cos x^(n)dx

If S=cos^2(pi/n) + cos^2((2pi)/n) +....+ cos^2((n-1)pi)/n , then S equals

Evaluate: (i) int(cos2x+2s epsilon^(2)x)/(cos^(2)x)dx (ii) int(2cos^(2)x-cos2x)/(s in^(2)x)dx

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

Evaluate: int(s in^(6)x+cos^(6)x)/(s in^(2)x cos^(2)x)

Prove that int(dx)/((1+x^(2))^(n))=(1)/(2(n-1))[(x)/((1+x^(2))^(n-1))+(2n-3)int(dx)/((1+x^(2))^(n-1))],n in N Hence,computer the value of int cos^(4)xdx

If I_(n) = int_(0)^(n) ( 1- sin 2nx)/( 1-cos 2n)dx then I_(1) , I_(2) , I_(3),"........" are in :