3sinx-√3×cosx=2√3×sin(x+y) 求y 做不出郁闷啊
问题描述:
3sinx-√3×cosx=2√3×sin(x+y) 求y 做不出郁闷啊
答
2又根号3除过左边得,
√3/2sinx-1/2cosx=sin(x+y)
sinxcon(-30)+conxsin(-30)=sin(x+y)
y=-30