Ques 19 Q.19. Evaluate ∫ 0 π 2 cos x 1 + cos x + sin x d x using Share with your friends Share 0 Neha Sethi answered this Dear student Note: 1) cos2A=1-tan2A1+tan2A2) sin2A=2tanA1+tan2A 3) 1+tan2A=sec2A Regards 0 View Full Answer