momenibrahimelayyan
momenibrahimelayyan
28-01-2021
SAT
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What is the answer with steps
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DWRead
DWRead
28-01-2021
cos(2θ) = cos²θ - sin²θ = (1-sin²θ)-sin²θ = 1-2(7/9)^2 = -17/81
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