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Wednesday, April 2nd

Warm Up. Wednesday, April 2nd . 8 m. h. 30°. Find the height of the parallelogram 2. 5 7 Find the missing side length. 15 m. EOCT Week 12 #3. Friday April 4th. Right Triangle Quiz . Rest of the week. Today: Introduce trig ratios

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Wednesday, April 2nd

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  1. Warm Up Wednesday, April 2nd 8 m. h 30° Find the height of the parallelogram 2. 5 7 Find the missing side length 15 m.

  2. EOCT Week 12 #3

  3. Friday April 4th Right Triangle Quiz

  4. Rest of theweek Today: Introduce trig ratios Thursday: Finding missing side lengths using trig and Review Friday: Quiz

  5. 20 m x What is different about this triangle than yesterday’s triangles? What is the same? How could we find x?

  6. Trig Ratios

  7. The Trigonometric Functions SINE COSINE TANGENT

  8. SINE Pronounced “sign”

  9. COSINE Pronounced “co-sign”

  10. TANGENT Pronounced “tan-gent”

  11. Greek Letter q Prounounced “theta” Represents an unknown angle

  12. hypotenuse hypotenuse opposite opposite adjacent adjacent

  13. Trick to remember SOH CAH TOA

  14. Find the sine, the cosine, and the tangent of angle A. Give a fraction. 10.8 9 A 6 Shrink yourself down and stand where the angle is. Now, figure out your ratios.

  15. Example 1 Write the trigonometric ratio as a fraction and as a decimal rounded to the nearest hundredth. Find sin J

  16. Example 2 Write the trigonometric ratio as a fraction and as a decimal rounded to the nearest hundredth. cosJ

  17. Example 3 Write the trigonometric ratio as a fraction and as a decimal rounded to the nearest hundredth. tan K

  18. Find Sin A

  19. Find Tangent B

  20. Find Cosine A

  21. Finding an angle.(Figuring out which ratio to use and an inverse trig button.)

  22. 20 m ) 20 / 40 Tan-1 40 m Ex: 1 Figure out which ratio to use. Find x. Round to the nearest tenth. x Shrink yourself down and stand where the angle is. Now, figure out which trig ratio you have and set up the problem.

  23. 50 m 15 m ) 15 / 50 Sin-1 Ex: 2 Figure out which ratio to use. Find x. Round to the nearest tenth. x Shrink yourself down and stand where the angle is. Now, figure out which trig ratio you have and set up the problem.

  24. Ex. 3: Find . Round to the nearest degree. 17.2 9

  25. Ex. 4: Find . Round to the nearest degree. 7 23

  26. Ex. 5: Find . Round to the nearest degree. 200 400

  27. When we are trying to find a side we use sin, cos, or tan. When we are trying to find an angle we use (INVERSE) sin-1, cos-1,ortan-1.

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