Trigonometry, polynomials: how to solve equation 2sin(x)^2 - 2sin(x) - 1 = 0
Trigonometry, polynomials: how to solve equation 2sin(x)^2 - 2sin(x) - 1 = 0. Here I explain the solution to 2sin(x)^2 - 2sin(x) - 1 = 0.
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