GBK Precalculus Jordan Johnson

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# GBK Precalculus Jordan Johnson - PowerPoint PPT Presentation

GBK Precalculus Jordan Johnson. Today’s agenda. Greetings Inverse Trig Functions Quiz Journal / HW Clean-up. Next HW. Section 2-4: Exercises 15-19. Exercises 21-31 odd, 35, 39, 40, 42.

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### GBK PrecalculusJordan Johnson

Today’s agenda
• Greetings
• Inverse Trig Functions
• Quiz
• Journal / HW
• Clean-up
Next HW
• Section 2-4:
• Exercises 15-19.
• Exercises 21-31 odd, 35, 39, 40, 42.
• Star any problems where you were able to use the table of special sine/cosine values we made in class.
• Due Friday, 10/8/2010.
Inverse trig functions
• Using right-triangle trig definitions:
• sin-1 x is the inverse of sine on a restricted domain of sine.
• Read as “inverse sine of x” or “sine inverse of x”.
• Never as “sine to the minus one of x”.
When to Use Inverse Trig Functions
• Given: A right triangle, a side length, and an acute angle.
• Want to find: other side lengths.
Journal
• Journal entry #3 (hand in today):
• Write several paragraphs that address the following questions about this week’s classes in a narrative style:
• What did you do here? How did you use your time? What did you learn?
• Were there any surprises this week? (Meaning, any events or solutions or discoveries you found surprising?)
• What words / concepts were new to you this week? What do they mean?
• What was good about this week’s classes for you?
• What can you and I do better next week?
• Do you have any other comments?
Classwork/HW
• Section 2-4:
• Exercises 15-19.
• Exercises 21-31 odd, 35, 39, 40, 42.
• Star any problems where you were able to use the table of special sine/cosine values we made in class.
• Due Tuesday, 10/12.
• Read Section 2-5 and answer the Reading Analysis questions. Then do (also from 2-5):
• Q1-Q10.
• Exercises 1-7 odd, 12, 13, and 20.
• Due Wednesday, 10/13.
Clean-up / Reminders
• Pick up all trash / items.
• Push in chairs (at front and side tables).
• See you tomorrow!
Example
• Find the six trig functions of , if  terminates in Quadrant III and sin  = -2/3.