PreCalculus Honors

Tuesday, March 10th, 2009

Do Now

• What are the Periods of all 6 Trig Functions?

PeriodSineCosineTangentCosecantSecantCotangent

Homework Review

• Suppose you wanted to hit a target 1000 feet away. At 500 feet away is a tower that is 90 feet tall. What initial speed and angle of inclination would you need to use to have a chance at hitting the target, while also missing the tower?

Homework Review

• Range = 1000 feet • Height = 500 feet• g = 32.2 ft/sec/sec

Homework Review

• Did anyone get an answer? How did you do it?

Homework Review

• My solution…

Identities

What Is This?

The Pythagorean Theorem On The Unit Circle

The Pythagorean Theorem On The Unit Circle

The Pythagorean Theorem On The Unit Circle

The Pythagorean Theorem On The Unit Circle

The Pythagorean Theorem On The Unit Circle

http://www.humboldt.edu/~dlj1/PreCalculus/Images/UnitCircle.html

Identities

Using Identities: Practice Problem

Homework Review From Monday’s Problem Set

• Let’s go back and look at one final problem from the homework that was due on Monday.

• Problem 111…Calculating the time of a trip.

Homework Due Tomorrow

• Where did the above formula for the jogging problem come from?

• Well, I want you to figure it out!• For tomorrow: derive the formula that is used

in the “Calculating the time of a trip” problem.