x = 4     

10

1 or -5

-1, 0, undefined

QIV

sin q = 3/5, cos q = -4/5, tan q = -3/4, cot q = -4/3, sec q = -5/4, csc q = 5/3

-/3, 2/5, -3/2,

-/2, -/3

9

2 sin² q - sin q - 1

Identity

Identity