Question

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

Answer 1

\[C=85.5\]\[225-244=-240cosC\]\[15^{2}= 10^{2}+12^{2}-2(10)(12)cosC\]\[C=85.5\

Answer 2

Read the steps in reverse order.

Answer 3

thank you so much!

Answer 4

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