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. 5sin2 θ = 4cos2 θ 

b. tan θ = cos θ

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