Question

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y=sin11x/5*cos(x+10pi)/5-cos11x/5*sinx/5

Answer 1

sin²α + cos²α = 1sin²α = 1 - cos²α = 1 - 9/25 = 0,64sin α = ± 0.8При π<α<3π/2,  sin α < 0 Ответ: sin α = - 0.8