1.	Use the sum or difference identity for tangent to find the exact value of tan 255°.
		A.		B.
		C.		D.
		Hint
	2.	Complete the identity ______________.
		A.	-sin A	B.	-cos A
		C.	sin A	D.	cos A
		Hint
	3.	Use the sum or difference identity for cosine to find the exact value of cos 105°
		A.		B.
		C.		D.
		Hint
	4.	Use the sum or difference identity for tangent to find the exact value of tan 165°.
		A.	-	B.
		C.	1	D.	- 2
		Hint
	5.	Complete the identity tan ( - A) = ________.
		A.	-cot A	B.	tan A
		C.	-tan A	D.	cot A
		Hint