Instructor: Mike Panitz
(mpanitz@cascadia.ctc.edu)

•
Trig Equations:
–
Section ( 7.7-7.8
/ 4e ( 9.7-9.8 / 3e))
•
Review for Exam #2
Math 120: Pre-Calculus 2 2

•
Law of Sines
–
( 8.2
/ 4e ( 10.2
/ 3e))
•
Law of Cosines
– ( 8.3
/ 4e ( 10.3
/ 3e))
Math 120: Pre-Calculus 2 3

• You’re allowed to bring ONE 3”x5” card, filled front & back, with all the handwritten notes that you can fit onto it.
•
Calculators will (again) be reset at the start of the exam
Math 120: Pre-Calculus 2 4

• Go back & make sure you’re able to answer all the problems from
–
Exam #1,
– the Complementary Angles quiz,
– the in-class exercises,
– and the homework problems.
Math 120: Pre-Calculus 2 5

• Possible Topics include, but are not limited to:
• “Fill in trig functions, using identities”
–
For each function: No identity, no points
•
Establishing trig identities
–
If you want to use a rearranged trig identity, then rearrange it in a box, off to the side, like you saw in class
•
Prove that sin(2A)=2sinAcosB, etc
–
(using sin(A+B))
•
INVERSE TRIG FUNCTIONS
Math 120: Pre-Calculus 2 6

•
Not on the exam:
– Prove that sin(45°) =
1
2
Math 120: Pre-Calculus 2 7

• All homeworks will be collected on the day of the next exam (Feb 23 rd )
– This is NEXT LECTURE
–
Collected at the beginning of class
–
Hand them in before you start the exam
• If you don’t have it @ the start of the exam, you can hand it in later that day, to room 154.
– If you don’t hand it (all) in that day, you will get a zero for any missing homework assignments.
Math 120: Pre-Calculus 2 8

• Homeworks are divided up into “blocks”
–
One block is collected per exam
• (Block #1 was collected piecemeal, in order to get ya’ll in the habit of doing your HW daily)
–
Each block is worth 32 points.
•
MAKE SURE YOU HAND IN YOUR
HOMEWORK ON THURSDAY!!!!
Math 120: Pre-Calculus 2 9

•
Remaining HW from block 1 will be handed back at the end of lecture today
•
The quiz will be handed back at the end of lecture, after the 2 remaining people have taken it.
– We’ll then go over the quiz
• @ End of lecture: Q+A if you’ve got any questions
Math 120: Pre-Calculus 2 10