求下列各三角函数值

问题描述:

求下列各三角函数值
(1)tan240° (2)sin 3分之16π
(3)sin(-6分之35π) (4)cos (-3分之25π)
(5)tan (-4分之33π) (6)cos (-4分之45π)

(1)tan240° =tan(180°+60)=tan60=√3(2)sin16p/3=sin(5p+p/3)=-sinp/3=-√3/2(3)sin(-6分之35π)=sinp/6=1/2(4)cos (-3分之25π)=sinp/3=√3/2(5)tan (-4分之33π)=tan(-p/4)=-1(6)cos (-4分之45π) =cos(...