? Help Search X JU 216 5 Use the given substitution to find each of the following. V ol 1 + sin 0 a i -do, u = sin 0 cos O ii sin 20 1 + cos 0 de, u = 1 + cos 0 col bi 4-9x da, x = - sin 0 ii 1 - 4x dx, x = - cos 0 1 X ci V1 - x'dx, x = cos 0 V V ii V36 - x-dx, r = 6 sin 0 217 6 Find / sin? (2 dx. 7 a Show that tan x = tan x sec x - tan c. b Hence find / tan3 x da