PC Ch 5 Test 1 Review Name Date: Things to Know 1. Trig Identities
a. reciprocal b. quotient c. even/odd d. cofunction e. Pythagorean
2. Unit Circle
Find the value of each expression using the given information.
1. If cos 𝜃 = !! and sin 𝜃 = !"
!, find tan 𝜃.
2. If sec 𝑥 = !!, find cos 𝑥.
3. If csc 𝜃 = !!, and cot 𝜃 = ! !
!, 𝑓𝑖𝑛𝑑 sec 𝜃.
4. If tan 𝑥 = −2.75, find cot !!− 𝑥
5. If cos 𝑥 = 0.98, find sin 𝑥 − !!.
6. If cos 𝜃 = −0.8, find sin !!− 𝜃 .
7. If sin 𝜃 = 0.7, find cos(𝜃 − !!).
8. If tan 𝑥 = 2.7, find cot 𝑥 − !!.
Simplify each expression to a single term with no fractions. 9. cot! 𝑥 sec! 𝑥
10. csc 𝑥 − cos 𝑥 cot 𝑥
11. !!!"#! !!"#! !
12. !"#! !"# !!"# !
13. sec 𝑥 sin 𝑥 cot 𝑥 csc 𝑥
14. sin! −𝑥 + cos! −𝑥
15. !"#! !!!"#! !!"# !!
16. sin! 𝑥 + cos! 𝑥 + cot! 𝑥
17. !"#! !!"#! !!!
Verify each identity. Show all work for any credit.
18. !!!"#! !!!!"#! !
= sin! 𝑥
19. !"!! !"# !!!!"#! !
= cos 𝑥
20. cos 𝑥 tan! 𝑥 + cos 𝑥 = 𝑠𝑒𝑐 𝑥
21. 2 sin! 𝑥 − 1 = 1 − 2 cos! 𝑥
22. !"# !!"# !
+ !!"# !
= 2sec 𝑥
23. !"#!!"#!
+ !"!!!"#!
= sec 𝜃 + csc 𝜃
24. !"#!!"#!
+ !"#!!"!!
= 1
25. cot 𝜃 csc 𝜃 + sec 𝜃 = csc! 𝜃 sec 𝜃 Find all solutions of the equation on the interval [0, 𝟐𝝅). 26. 2 sin 𝑥 + 2 = 0
27. tan 𝑥 − 1 = 0
28. tan! 𝑥 = − tan 𝑥
29. 2 cos 𝑥 − 1 = 0
30. sin 𝑥 − sin! 𝑥 = 0
31. 2 sin 𝑥 = 2
32. tan! 𝑥 − 3 = 0
33. 9 + cot! 𝑥 = 12