Mat 152 - Trigonometry

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Mat 152 - Trigonometry

• Right TriangleTrigonometry
• Section 6.5

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Right Triangle Trigonometry

• Given an acute angle ? in a right triangle we
  have sin ?
• cos ?
• tan ?
• csc ?
• sec ?
• cot ?

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Right Triangle Trigonometry

• Observations/Cofunction Identities
• 1) sin? cos(90º- ?) 4) cot? tan(90º-
  ?)
• 2) cos? sin(90º- ?) 5) sec? csc(90º-
  ?)
• 3) tan? cot(90º- ?) 6) csc? sec(90º-
  ?)

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Right Triangle Trigonometry

• Use a calculator to compute the following
  values.
• a) sin(27º)
• b) tan(3p/7)
• c) sec(13º)
• d) cot(11p/17)

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Right Triangle Trigonometry

• At a certain time of day, the angle of
  elevation from the edge of Lake Jovita at point P
  to the top of the new building is 34º. To the
  nearest foot, find the height of the new building
  that is 45 ft from P.

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Right Triangle Trigonometry

• Reference
• PreCalculus
• Cohen
• 4th Edition