capooza
Using the law of cosines (trig), find the measures of a triangle that has a=10, b=12, and c=15.



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Mertsj
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\[C=85.5\]\[225244=240cosC\]\[15^{2}= 10^{2}+12^{2}2(10)(12)cosC\]\[C=85.5\

Mertsj
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Read the steps in reverse order.

capooza
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thank you so much!

Mertsj
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yw