Mathematics, 07.12.2020 19:20 adiafloresp2dkbx

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

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

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Another question on Mathematics

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