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Warm – up : Find the missing measures. Write all answers in radical form.

Warm – up : Find the missing measures. Write all answers in radical form. 30 °. 45 °. x. 7. 10. z. 45 °. w. 60 °. y. Gettin’ Triggy With It Video. http://www.youtube.com/watch?v=t2uPYYLH4Zo http://www.schooltube.com/video/1e49182438433ab755b1/Gettin'%20Triggy%20Wit%20It.

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Warm – up : Find the missing measures. Write all answers in radical form.

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  1. Warm – up: Find the missing measures. Write all answers in radical form. 30° 45° x 7 10 z 45° w 60° y

  2. Gettin’ Triggy With ItVideo http://www.youtube.com/watch?v=t2uPYYLH4Zo http://www.schooltube.com/video/1e49182438433ab755b1/Gettin'%20Triggy%20Wit%20It

  3. The Trigonometric Functions we will be looking at SINE COSINE TANGENT

  4. The Trigonometric Functions SINE COSINE TANGENT

  5. SINE Prounounced “sign”

  6. COSINE Prounounced “co-sign”

  7. TANGENT Prounounced “tan-gent”

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

  9. hypotenuse hypotenuse opposite opposite adjacent adjacent

  10. We need a way to remember all of these ratios…

  11. Some Old Hippie Came A Hoppin’ Through Our Old Hippie Apartment

  12. Sin SOHCAHTOA Opp Hyp Cos Adj Hyp Tan Opp Adj Old Hippie

  13. Finding sin, cos, and tan

  14. SOHCAHTOA 10 8 6

  15. Find the sine, the cosine, and the tangent of angle A. Give a fraction and decimal answer (round to 4 places). 10.8 9 A 6

  16. Find the values of the three trigonometric functions of . ? Pythagorean Theorem: 5 4 (3)² + (4)² = c² 5 = c 3

  17. Find the sine, the cosine, and the tangent of angle A Give a fraction and decimal answer (round to 4 decimal places). B 24.5 8.2 A 23.1

  18. Word Problems…

  19. Ex. A surveyor is standing 50 feet from the base of a large tree. The surveyor measures the angle of elevation to the top of the tree as 71.5°. How tall is the tree? tan 71.5° ? tan 71.5° 71.5° y = 50 (tan 71.5°) 50 y = 50 (2.98868)

  20. Ex. 5 A person is 200 yards from a river. Rather than walk directly to the river, the person walks along a straight path to the river’s edge at a 60° angle. How far must the person walk to reach the river’s edge? cos 60° x (cos 60°) = 200 200 60° x x X = 400 yards

  21. To find the distance d from a house on shore to a house on an island, a surveyor measures the distance between points A and B as shown. Using an instrument called a transit, he finds the measurement of . • What is the distance between the 2 houses?

  22. SOLVE IT! • Draw a picture. • Label it with what you know. • Identify what you need to find. • Find the right triangle – (if there isn’t one, make one!). • Solve using right triangle trig. Ratios. • To find the distance d from a house on shore to a house on an island, a surveyor measures the distance between points A and B as shown. Using an instrument called a transit, he finds the measurement of . • What is the distance between the 2 houses?

  23. Solve the problem:

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