Solve each equation on the interval 0 < 2. 1) 2 sin + 3

Solve each equation on the interval 0 ≤ θ < 2π.

1) 2 sin θ + 3 = 2

2) 2 sin θ + 1 = 0

3) tan θ  + 1 = 0

4) 4 sec θ + 6 = -2

5) sin (3θ) = -1

6) cos (2θ) = -1/2