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  3. use the law of cosines to determine the indicated

Use the Law of Cosines to determine the indicated side x Assume b 14 and...

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Geometry

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Use the Law of Cosines to determine the indicated side x Assume b 14 and c 18 Round your answer to one decimal place C b c a Step 1 The Law of Cosines states that for the triangle ABC with sides a b and c b 108 a 18 x 14 B 324 196 In the given triangle you know sides b and c and angle A and need to find a So you can rewrite this formula a c b 6 cos A Step 2 Substitute known values into the alternate form of the Law of Cosines Round your answer to three decimal places a 2 b 2ab cos A 2 2 2ab 28 14 2bc cos C 1 18 cos 108 1x cos 108

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