HOW DO YOU SOLVE TAN(-3/4pi), sin(x-1/2pi), sin(5pi/3), tan(5pi/6), sin(pi-x)
tan(1/2pi-x), cos(4pi-x), cos(x+3/2pi), tan(x+1/2pi), sin(-2/3pi), cos{-5/4pi},
tan(5pi/6), cos(7pi