Решим уравнение 3^x=4-x:3^x = 4 - x3^x = 4 - x3^x + x = 4x(3^x + 1) = 4x = 4 / (3^x + 1)
а) sin 150˚ = sin(180˚ - 30˚) = sin30˚ = 0.5б) cos 75˚ = sin(90˚ - 15˚) = sin15˚ = 0.2588
Решим уравнение 3^x=4-x:
3^x = 4 - x
3^x = 4 - x
3^x + x = 4
x(3^x + 1) = 4
x = 4 / (3^x + 1)
а) sin 150˚ = sin(180˚ - 30˚) = sin30˚ = 0.5
б) cos 75˚ = sin(90˚ - 15˚) = sin15˚ = 0.2588