pabitragurung21 pabitragurung21

07-12-2020
Mathematics

contestada

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

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Sueraiuka Sueraiuka

07-12-2020

Step-by-step explanation:

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See explanation on picture.

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