Asked by dbo
Solve the equation cos (3θ +120°) = √(3 /2 for 0° ≤ θ≤ 180°
Answers
Answered by
Steve
cos(x) = √3/2 if x = 30° or 330°
So,
3θ+120 = 30, 330, 390, 690, ...
θ = -30, 70, 90, 190, ...
So, pick the values in your domain.
So,
3θ+120 = 30, 330, 390, 690, ...
θ = -30, 70, 90, 190, ...
So, pick the values in your domain.
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