试举例说明:直线xsinθ-ycosθ=1的倾斜角不一定是θ
问题描述:
试举例说明:直线xsinθ-ycosθ=1的倾斜角不一定是θ
答
例如θ=-π/3时
xsin(-π/3)-ycos(-π/3)=1
设直线的倾斜角是A,则有
tanA=tan(-π/3)=-√3
A=2π/3≠θ