Решить!!! sin п/12*cos 11п/12+cos п/12*cos 11п/12

Question

Решить!!! sin п/12*cos 11п/12+cos п/12*cos 11п/12

Answer 1

Sin(π/12) * cos(11π/12) + sin(11π/12) * cos(π/12) = sin(π/12 + 11π/12) = sin(12π/12) = sin(π) = 0°