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Published byKory Weaver Modified over 9 years ago
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7.5 Values of Trig Functions
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Trig Values for Non-special Angles Use calculator to find value & round to 4 digits * make sure calc is in DEG mode * angle first or cos first depends on calc Calc doesn’t have cot but has tan Ex 1) Ex 2)
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Trig Values for Non-special Angles Change to decimal degrees No degree symbol → Radians!! Change mode on calc Ex 3) Ex 4)
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Ex 5) If 0° ≤ < 360°, find the angle in QI such that, round to nearest tenth degree Finding Angles Use inverse sin to find angle trig value
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Ex 6) If 0 ≤ < 360 , find to nearest tenth of a degree if cos = – 0.9641, QIII QIII 180 First, find the related angle Change trig value to positive 15.4
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Ex 7) Find in Q IV to nearest tenth degree such that cot = – 8.028 QIV Change to (+) for ref angle 360 7.1
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Homework #716 Pg. 418 1 – 35 odd
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