Find: ∫sinx dx\int \sin x \, dx∫sinxdx
Find: ∫sec2xtan2x dx\int \sec 2x \tan 2x \, dx∫sec2xtan2xdx
Find: ∫3cosec26x dx\int 3 \operatorname{cosec}^2 6x \, dx∫3cosec26xdx