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Shtirlitz [24]
3 years ago
9

If A+B+C=180c) cos A + cos B + cos C = 1+4 sinA/2sinB/2sinC/2​

Mathematics
1 answer:
boyakko [2]3 years ago
6 0

Step-by-step explanation:

Hey there!

<em>See </em><em>explanation</em><em> </em><em>on </em><em>picture</em><em>.</em>

<em><u>Hope </u></em><em><u>it </u></em><em><u>helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

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