Manpreet Raj13 Years agoAbhishek Kumar, u need to do this by using integration by parts. u must be knowing the ILATE rule. so, taking x as the 1st function and sin^2x as the 2nd function, integrate it by using the formula : integration uv dx = u ( integration v dx) - integration { (du/dx) integration v dx} dx the answer will come out as : ( x/2 - sin4x/8 ) ( x-1) post ur feedback thanks