Mathematics, 21.06.2019 13:40 wowwowumbsi

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

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In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of si...

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