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Published byTracy Holland Modified over 9 years ago
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7.3 More on Trig Functions
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Example 1 Determine exact values of trig functions of angle that terminates in QIV and 17 8 Q IV Q IV tells us its (–) -15
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Example 1 17 8 Q IV -15
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Ex 2) Write in terms of the same trig function of the related angle 261 QIII so sin is (–) 261 – 180 = 81 QIV so cos is (+) QII so tan is (–) 218 30 – 180 = 38 30 Ref always to x-axis (Not y-axis)
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Summary of 7.3 60 30 SOH CAH TOA
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Summary of 7.3 180 (-1, 0) 90 (0, 1) 00 (1, 0) 270 (0, -1) 45 x y All POSITIVE Sin CosTan
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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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