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Find cos A

 

 Nov 30, 2020
 #1
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Using the law of cosines we have:

 

42 = 52 + 62 - 2 * 5 * 6 * cosA

 

cosA = (52 + 62 - 42) / 2 * 5 * 6   ==>     cosA = 3/4

 Nov 30, 2020

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