1. Prove that tan x sinx + cosx = 1/cosx

2. Prove that Tanx = sinx + sin²x/ cos x (1+ sinx)

3.prove that sinx - cosx = sinx-cosx

4. solve for x, where O◦ ≤ x ≤ 360◦

a) cosx (1-2sinx) = 0 (two answers)

b) 4sin²x-1 = 0 (two answers)

c) 2cosx + cosx -1 =0 (two answers)

d) 3sinx + 4sin x =4 (two answers)

I'm so lost with this stuff right now. I'm sorry its so much.