Hello Kriti
We have solved this question by Integration by Parts.
Please check https://www.teachoo.com/5054/1287/Ex-7.6--9---Integrate-x-cos-1-x---Chapter-7-Class-12/category/Integration-by-parts/
If you have any doubts, please ask.
Written on Sept. 29, 2017, 1:01 p.m.