(-square root 3/2, 1/2) 150 degrees 5pie/6
find sin cos tan cot cos and sec
sin (150) = 1/2 csc (150) = 2
cos (150) = -√3 / 2 sec (150) = - 2 / √3
tan (150) = 1 / √3 cot (150) = √3
