1.	Simplify cos x tan x.
		A.	cos x	B.	csc x
		C.	sin x	D.	1
		Hint
	2.	Simplify cos x + cos x tan2 x.
		A.	sec x	B.	1 + tan x
		C.	tan x	D.	csc x
		Hint
	3.	Determine the exact value of cos, given sin and 0° < < 90°
		A.		B.
		C.		D.
		Hint
	4.	Express cot (-840°) as a trigonometric function of an angle in Quadrant I.
		A.	- tan 60°	B.	cot 60°
		C.	tan 60°	D.	- cot 60°
		Hint
	5.	Which identity is not a Pythagorean identity?
		A.	1 + cot2 = csc2	B.
		C.	sin2 + cos2 = 1	D.	tan2 + 1 = sec2
		Hint