Question

π/10 = (0.95, 0.31)

3π/10 = (3/5, 4/5)
20° = (28/30, 10/30)

are these correct?
tan 70° = 28/10
csc 21π/10 = 1/0.31
sec 17π/10 = 5/3

Answer 1

Looks good to me.