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7.3 More on Trig Functions

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  1. 7.3 More on Trig Functions

  2. Example 1 Determine exact values of trig functions of angle that terminates in QIV and 8  -15 17 Q IV Q IV tells us its (–)

  3. Example 1 8  -15 17 Q IV

  4. Ex 2) Write in terms of the same trig function of the related angle 261 21830 – 180 261 – 180 = 81 = 3830 QIII so sin is (–) QIV so cos is (+) QII so tan is (–) (Not y-axis) Ref  always to x-axis

  5. Summary of 7.3 60 SOH CAH TOA 30

  6. Summary of 7.3 POSITIVE 45 y 90 (0, 1) Sin All x Tan Cos 0 180 (-1, 0) (1, 0) (0, -1) 270

  7. Homework #708 Pg. 407 2, 4, 20, 21, 26, 27 – 39 odd, 42, 43, 46, 49, 51 – 57 odd, 61, 65, 70, 74

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