cos(3π/2) = 0
cos(π/3 + α) = cos(π/3)cosα - sin(π/3)sinα
cos(π/3) = 1/2sin(π/3) = √3/2
cos(π/3 + α) = 1/2 0.6 - √3/2 0cos(π/3 + α) = 0.3
Ответ: cos(π/3 + α) = 0.3
cos(3π/2) = 0
cos(π/3 + α) = cos(π/3)cosα - sin(π/3)sinα
cos(π/3) = 1/2
sin(π/3) = √3/2
cos(π/3 + α) = 1/2 0.6 - √3/2 0
cos(π/3 + α) = 0.3
Ответ: cos(π/3 + α) = 0.3