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PRE-CALCULUS LAWS OF SINES & COSINES REVIEW Name Brooklyn Steinberg Date Q-6 -12 Period a" = b* + c' - 2becos A cos A= 6 +c' - a] sinA sinB sinc 2bc a b b' = al + c2 -2ac cos B _a+ c ? - 6 3 cos B = 2 2ac c' = a +b' - 2abcos C cos c _ a +b - c 2ab For questions 1-6, Use Law of Sines or Law of Cosines to solve for all missing side lengths and angle measures. Round all side lengths to the tenth and angle measures to the whole number. 1 2. 18 25 cm 59 24 cm 3 4 57 48 10 mi 12 mi 33 B 17 mi 5. In AABC, measure of angle B is 37, a = 18 and b = 37 6. In AABC, a = 9, b = 21, c = 25