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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.

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Presentation on theme: "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."— Presentation transcript:

1 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

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

3 Do Now b) 2cos2x + cosx - 1 = 0

4 CHALLENGE OF THE WEEK!!

5 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.

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

7 Today's Agenda: 1. Do Now 2. Today's Objective 3. Solving for Principal Values of Trig Equations: Continued 4. Practicing with Whiteboards

8 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

9 Solving for Principal Values of Trig Equations: Continued

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15 Practicing with Whiteboards!!

16 Solve each equation for principal values of x. Express solutions in degrees. 2sin2x - 1 = 0

17 Solve each equation for principal values of x. Express solutions in degrees. cos x = 3 cosx - 2

18 Solve each equation for principal values of x. Express solutions in degrees. sec2x + tanx - 1 = 0

19 Solve each equation for principal values of x. Express solutions in degrees. 4sin2x - 4sinx + 1 = 0

20 Solve each equation for principal values of x. Express solutions in degrees. cos 2x + sinx = 1

21

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