Solve for , in the interval 0 360, the following equations. Give your answers

Solve for θ, in the interval 0 ≤ θ ≤ 360°, the following equations. Give your answers to 3 significant figures where they are not exact.

a. 4cos² θ = 1 

b. 2sin² θ − 1 = 0 

c. 3sin² θ + sin θ = 0

d. tan² θ − 2tan θ − 10 = 0 

e. 2cos² θ − 5cos θ + 2 = 0 

f. sin² θ − 2sin θ − 1 = 0

g. tan² 2θ = 3