1.	If sin = and has its terminal side in the first quadrant, find the exact value of cos 2.
		A.		B.	1
		C.		D.
		Hint
	2.	Use a half-angle identity to find the exact value of sin 67.5°.
		A.		B.
		C.		D.
		Hint
	3.	Find sin 2 if sin = and 0° < < 90°.
		A.		B.
		C.		D.
		Hint
	4.	Complete the identity = ________.
		A.	sin x	B.	cos x
		C.	cot x	D.	tan x
		Hint
	5.	Find the value of tan 2 if sin = and 0 < < .
		A.		B.
		C.		D.	-
		Hint