Use the identity cos^2(θ) + sin^2(θ) = 1 to find sin(θ) when cos(θ) = 0.5
Really lost on this. Is it something to do with the identities cos^2(x) = 1/2 + 1/2 cos(2x) and sin^2(x) = 1/2 - 1/2 cos(2x) ?
Please provide a solution with steps.
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