SOLUTION: Find two values of θ, 0 ≤ θ < 2π, that satisfy the given trigonometric equation.
cos θ = − 1/2
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Question 849337: Find two values of θ, 0 ≤ θ < 2π, that satisfy the given trigonometric equation.
cos θ = − 1/2
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find two values of θ, 0 ≤ θ < 2π, that satisfy the given trigonometric equation.
cos θ = − 1/2
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arccos(-1/2) = 180-60 = 120 degrees = (2/3)pi
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OR
arccos(-1/2) = 180+60 = 240 degrees = (4/3)pi
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Cheers,
Stan H.
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