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