Question

How do you find the 6 trigonometric functions for pi/2?

Answer 1

If P(x,y) submits `alpha` at the centre of unit circle, x = cos `alpha` , y = sin`alpha`, tan`alpha` = y/x. etc.
For `alpha` = `pi/2` , x = 0, y = 1. `=>` cos`pi/2` = 0, sin`pi/2` = 1 and tan`pi/2`= 1/0 (undefined)

Explanation:

csc`pi/2` = 1,sec`pi/2` = 1/0(undefined) and cot`pi/2` = 0.