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For each angle θ listed below, find the reference angle α, and then find sin θ. Round sin θ to four decimal places, if necessary. θ = 405° ? ?

User Fishy
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Answer:

α = 405° - 360°

α = 45°

α is found in 1st quadrant. Therefore, sin α is positive.

sin α = 0.7071

User Derek
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