sin(2x-30度)=-1 解方程
问题描述:
sin(2x-30度)=-1 解方程
答
sin(2x-30°) = -1
2x-30° = -90° ± k×360° ,k∈Z
2x = -60° ± k×360° ,k∈Z
x = -30° ± k×180° ,k∈Z