Надо 1. 3cos2x - 31cos^2 x + 27=0 2. 3cos2x - 22sinx - 15=0 3. 19sin2x + 6cos^2 x - 12=0 4. 9cosx + sinx -

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Математика: Надо 1. 3cos2x - 31cos^2 x + 27=0 2. 3cos2x - 22sinx - 15=0 3. 19sin2x + 6cos^2 x - 12=0 4. 9cosx + sinx - 1=0

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Надо 1. 3cos2x - 31cos^2 x + 27=0 2. 3cos2x - 22sinx - 15=0 3. 19sin2x + 6cos^2 x - 12=0 4. 9cosx + sinx - 1=0