Question: Solve for , in the interval 180 180, the following equations. Give your answers to 3 significant figures where they are not

Solve for θ, in the interval −180° ≤ θ ≤ 180°, the following equations. Give your answers to 3 significant figures where they are not exact.

a. sin2 2θ = 1 

b. tan2 θ = 2 tan θ

c. cos θ (cos θ − 2) = 1 

d. 4sin θ = tan θ

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