sin(2x-30度)=-1 解方程

问题描述:

sin(2x-30度)=-1 解方程

sin(2x-30°) = -1
2x-30° = -90° ± k×360° ,k∈Z
2x = -60° ± k×360° ,k∈Z
x = -30° ± k×180° ,k∈Z