Trigonometric help sin,cost,tan,csc,sec,cot

cyclic functions

Sec(pi/4)
csc(pi/3)
sin(-30 dgree)
tan 420 degree
cos(-90 degree)

Sec(pi/4) = 1 / Cos(pi/4) = root(2) = 1.41421...

Cosec(pi/3) = 1 / Sin(pi/3) = 2 / root(3) = 1.15470...

Sin(-30) = -1/2 = -0.5

Tan(420) = Tan(420 - 360) = Tan(60) = root(3) = 1.73205...

Cos(-90) = 0