一直直线的倾斜角,求直线的斜率(1)α=30° (2)α=45°(3)α=5π/6 (4)α=2π/3(5)α=89° (6)α=2.

问题描述:

一直直线的倾斜角,求直线的斜率
(1)α=30° (2)α=45°
(3)α=5π/6 (4)α=2π/3
(5)α=89° (6)α=2.

1.k=tan30°=根号3/3
2.tan45°=1
3.tan5π/6=-根号3/3
4.tan2π/3=-根号3
5.tan89°=57.29
6.tan2=tan(2×57.3°)=tan114.6°=-2.184