作出下列各角的正弦线、余弦线、正切线.（1）5π/6（2）-2π/3（3）-13π/6都画出来图

Question

作出下列各角的正弦线、余弦线、正切线.
（1）5π/6（2）-2π/3（3）-13π/6
都画出来图

Answer 1

(1)sin(5π/6)=1/2
cos(5π/6)=-3的开方/2
tan(5π/6)=-3的开方/3
(2)sin(-2π/3)=-3的开方/2
cos(-2π/3)=-1/2
tan(-2π/3)=3的开方
(3)sin(-13π/6)=1/2
cos(-13π/6)=-3的开方/2
tan(-13π/6)=-3的开方/3