1.	Write an equation for the graph.
		A.	y = 2 cos	B.	y = cos 2
		C.	y = cos	D.	y = -2 cos
		Hint
	2.	Simplify sin .
		A.	sin x + cos2x	B.	2 cos x
		C.	tan x	D.	2 sin x
		Hint
	3.	Simplify cos B + tan B sin B
		A.	cos B	B.	cot B
		C.	sec B	D.	sin B
		Hint
	4.	is equivalent to _____.
		A.	tan2x - 1	B.	sin2x + cos x
		C.	cot2x	D.	2 tan x
		Hint
	5.	Which expression is equivalent to (sin x + cos x)2.
		A.	2 csc 2x	B.	cos2x + 1
		C.		D.	1 + sin 2x
		Hint
	6.	Find all solutions of sin 2x = cos x if .
		A.	,	B.	,
		C.	,	D.	,
		Hint
	7.	What is the amplitude and period of the function y = 3 cos (-)?
		A.	Amplitude = 3, Period = –	B.	Amplitude = 2, Period =
		C.	Amplitude = 3, Period =	D.	Amplitude = 3, Period = 2
		Hint
	8.	How is the function y = sin + 2 shifted?
		A.	shifted 2 units to the right	B.	shifted 2 units up
		C.	shifted 2 units down	D.	shifted 2 units to the left
		Hint
	9.	Which of the following is an example of a function with a phase shift?
		A.	y = 5 sin	B.	y = 3 + cos
		C.	y = 2 sin ( – 15)	D.	y = 1 + 3 cos
		Hint
	10.	Which expression is equivalent to 2 tan ?
		A.
		B.
		C.
		D.
		Hint
	11.	Which statement is true?
		A.	cos 135° = sin 45°
		B.	sin 30° = cos 300°
		C.	cos 225° = sin 45°
		D.	sin 45° = –cos (–45°)
		Hint
	12.	Which statement is false?
		A.	cos 405° = –sin 225°
		B.	sin 30° = –cos 120°
		C.	sin 450° = cos 180°
		D.	cos 210° = sin 240°
		Hint
	13.	Suppose sin = and sin 2 = . In which quadrant(s) could this be?
		A.	first and second	B.	first only
		C.	second only	D.	first or fourth
		Hint
	14.	Solve cos = 3 cos – 1.
		A.	60°, 300°	B.	30°, 330°
		C.	60°, 120°	D.	30°, 150°
		Hint