摘要： $$\left\{\begin{aligned}&\cos (x_3) \sin (x_2) \sin (x_1)-\sin (x_3) \cos (x_1)=-0.9944 \\&\sin (x_3) \sin (x_2) \sin (x 1)+\cos (x_3) \cos (x_1)=-0.0 阅读全文