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Advanced Functions Trig Help just got back my trig test I bombed..... so need help with a few trig questions (answers in radians not degrees), Q1: given csc^2 x = (64/25) and x lies in quadrant 3 determine... a) sinx b) sin2x Q2: how many solutions are there for sin(8x) from -2pi to 2pi -I put 8 but the answers 32 o-o why? D; Q3: express as a single trig ratio, (1/2)-cos^2 4x - the answer is apparently (-1/3)cos 8x which i have not clue why and how to get there ;$ Q4: factor, sec x tan x + 4 - tan x - 4 sec x thanks