1.	State the amplitude and the period for y = 2 cos .
		A.	amplitude = -2, period = 180°	B.	amplitude = 2, period = 4
		C.	amplitude = 2 , period =	D.	amplitude = -2, period = 4
		Hint
	2.	Select the graph of .
		A.		B.
		C.		D.
		Hint
	3.	Simplify sin .
		A.	sin x + cos2x	B.	2 cos x
		C.	tan x	D.	2 sin x
		Hint
	4.	Simplify sec cos .
		A.	tan2 - 1	B.	sin2
		C.	cos2	D.	1
		Hint
	5.	Which expression is equivalent to csc x – sin x?
		A.	sin x – cos x	B.	cos2x + sin2x
		C.		D.	sin x + cos x
		Hint
	6.	Find the exact value of sin 225°.
		A.		B.
		C.	0	D.
		Hint
	7.	Find the exact value of sin 75°.
		A.		B.
		C.		D.
		Hint
	8.	Which expression is equivalent to (sin x + cos x)2.
		A.	cos2x + 1	B.
		C.	1 + sin 2x	D.	2 csc 2x
		Hint
	9.	Find all solutions of sin 2x = cos x if .
		A.	,	B.	,
		C.	,	D.	,
		Hint
	10.	How is the function y = 3 cos ( +20) – 4 shifted?
		A.	shifted 4 units up and 20° to the right
		B.	shifted 4 units down and 20° to the right
		C.	shifted 4 units up and 20° to the left
		D.	shifted 4 units down and 20° to the left
		Hint
	11.	Suppose that we want to shift the function y = 3 + sin [2( –45)] up 2 units. What would its equation be?
		A.	y = 5 + sin [2( –45)]	B.	y = 3 + sin [4( –45)]
		C.	y = 1 + sin [2( –45)]	D.	y = 5 + sin [4( –45)]
		Hint
	12.	Simplify .
		A.	sec	B.	csc 2
		C.	csc	D.	sec 2
		Hint
	13.	Given that cos = and 0° < < 90°, find cos 2.
		A.		B.
		C.		D.
		Hint
	14.	Solve cos = 3 cos – 1.
		A.	60°, 120°	B.	60°, 300°
		C.	30°, 330°	D.	30°, 150°
		Hint