f(x) = 0,5Cos2x
f(0) = 0,5Cos(2 * 0) =0,5Cos0 = 0,5 * 1 =0,5
Ответ : f(0) = 0,5
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f(x) = 0,5Cos2x
f(0) = 0,5Cos(2 * 0) =0,5Cos0 = 0,5 * 1 =0,5
Ответ : f(0) = 0,5