1. Instructor: Mike Panitz (mpanitz@cascadia.ctc.edu)
Math 120: Pre-calculus 2
Instructor: Mike Panitz

2. Today Trig Equations: Review for Exam #2
Section ( / 4e ( / 3e))
Review for Exam #2
Math 120: Pre-Calculus 2

3. Next next Lecture Law of Sines Law of Cosines (8.2 / 4e (10.2 / 3e))
Math 120: Pre-Calculus 2

4. Next Lecture: Exam #2
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

5. Exam #2: Study Tips
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

6. Exam #2: Possible Topics
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

7. Exam #2 Not on the exam: Prove that sin(45°) =
Math 120: Pre-Calculus 2

8. Homework
All homeworks will be collected on the day of the next exam (Feb 23rd)
This is NEXT LECTURE
Collected at the beginning of class
Hand them in before you start the exam
If you don’t have 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

9. Homework 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

10. Homework & Quiz
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