Good Morning, Precalculus!

To prepare for class:1. Take out your DO NOW sheet and start today's DO NOW!

Do Now:

Solve for principal values of x. Express your solutions using radians.a) 4sin2x - 1 = 0

b) 2cos2x + cosx - 1 = 0

Do NowSolve for principal values of x. Express your solutions using radians.a) 4sin2x - 1 = 0

Do Nowb) 2cos2x + cosx - 1 = 0

CHALLENGE OF THE WEEK!!

CHALLENGE OF THE WEEK!!

In the United States, the “poverty threshold” is $19,090 for a household of 3 people. Currently, the minimum wage is $7.25 an hour.Would one parent working full time (40 hours a week) at a minimum-wage job provide a family of 3 enough money to be considered above the “poverty threshold”? Should the federal minimum wage be raised? Write a one-paragraph “letter” to a government official arguing your point. Provide an argument based on mathematical evidence. P.S., there are 52 weeks in a year.

CRITERIA FOR FULL CREDIT:1. Your response must be written in a letter format, with a proper greeting and signature.2. Your PARAGRAPH must be AT LEAST 5 sentences.3. You must provide mathematical proof, clearly explained in words, for your reasoning.4. The problem is handed in by Wednesday, April 3.

Upcoming Assignments

For Tuesday, 4/2:pg. 459, #17-21

Today's Agenda:1. Do Now2. Today's Objective3. Solving for Principal Values of Trig Equations: Continued4. Practicing with Whiteboards

Today's Objective

Unit 11, Obj. 1: I will be able to solve for the principal values of a

trigonometric equation.

Section 7-5, pgs. 456-461

Solving for Principal Values of Trig Equations: Continued

Practicing with Whiteboards!!

Solve each equation for principal values of x. Express solutions in degrees.

2sin2x - 1 = 0

Solve each equation for principal values of x. Express solutions in degrees.

cosx = 3 cosx - 2

Solve each equation for principal values of x. Express solutions in degrees.

sec2x + tanx - 1 = 0

Solve each equation for principal values of x. Express solutions in degrees.

4sin2x - 4sinx + 1 = 0

Solve each equation for principal values of x. Express solutions in degrees.

cos2x + sinx = 1