5. Use a graphing or scientific calculator and the law of cosines, c = a² +² - 2ab cos C, a = b° +c - 2bc cos A, and b = a +c° - 2ac cos B to find the missing angle to the nearest degree or length to the nearest tenth. %3D A a = 6,6 = 13, c = 12, ZB =_ D94 O 43° O 68° O 86° O 47

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