SOLUTION: θ=157.5° Use a half-angle identity to find the exact value of sin(θ).
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Question 849135: θ=157.5° Use a half-angle identity to find the exact value of sin(θ).
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
θ=157.5° Use a half-angle identity to find the exact value of sin(θ).
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sin(157.5) = sin(315/2) = sqrt[(1-cos(315)/2] = sqrt[(1-(sqrt(2)/2))/2]
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= sqrt[(2-sqrt(2))/4]
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= sqrt[2-sqrt(2)]/2
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Chers,
Stan H.
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