1.	Simplify cos x + cos x tan2 x.
		A.	csc x	B.	tan x
		C.	1 + tan x	D.	sec x
		Hint
	2.	Determine the exact value of cos, given sin and 0° < < 90°
		A.		B.
		C.		D.
		Hint
	3.	Express cot (-840°) as a trigonometric function of an angle in Quadrant I.
		A.	cot 60°	B.	- cot 60°
		C.	- tan 60°	D.	tan 60°
		Hint
	4.	Simplify the expression sin x + 4 cos x + 2 sin -x - 2 cos -x
		A.	1	B.	3 sin x + 2 cos x
		C.	2 cos x - sin x	D.	0
		Hint
	5.	Which of the following is a valid trigonometric identity.
		A.	tan2 + cot2 = sin cos
		B.	Tan2 + cot2 = sec csc
		C.	tan + cot = sin cos
		D.	tan + cot = sec csc
		Hint