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2.3 Right Triangle Trigonometry

Odds and Even functions Evaluating trig functions Use a calculator to evaluate trig functions. 2.3 Right Triangle Trigonometry. Odds and Even Functions. Odd Functions sin (- ) = -sin  tan (- ) = -tan  csc (- ) = -csc  cot(- ) = -cot . Even Functions cos (- ) = cos 

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2.3 Right Triangle Trigonometry

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  1. Odds and Even functions Evaluating trig functions Use a calculator to evaluate trig functions 2.3 Right Triangle Trigonometry

  2. Odds and Even Functions • Odd Functions sin (-) = -sin  tan (- ) = -tan  csc (- ) = -csc  cot(- ) = -cot  • Even Functions cos (-) = cos  sec (- ) = sec 

  3. Example • If sin (-) = 3/5 Find sin () csc () • If cos () = -3/4 Find cos (-) sec (-) • If cos () = 4/5 Find cos (-) cos ( + )

  4. The Six Trigonometric Functions Hypotenuse B Opposite A Adjacent

  5. The Six Trigonometric Functions Hypotenuse B Adjacent A Opposite

  6. 6 Trigonometric Functions sin  = opp cos = adj tan = opp hyp hyp adj SOHCAHTOA AKA And their reciprocals!!! csc  = hyp sec  = hyp cot = adj opp adj opp

  7. Example Find the values of the six trigonometric functions of . 13 5 

  8. Example Find the values of the six trigonometric functions of . 4  4

  9. Example Find the values of the six trigonometric functions of . cos  = 5/7

  10. Example Find the values of the six trigonometric functions of . cot  = 5

  11. Example Find the values of the six trigonometric functions of . sec  = 6

  12. Example Find the values of the six trigonometric functions of . csc  =17/4

  13. Homework • PAGE 103 (31, 33, 35) • Page 113 (1-21 odd)

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