Cos (B+C - A) + cos (C+ A-B) + cos( A+B+C)
= 1 + 4 cos A. cos B. cos C....
Mathematics, 24.03.2021 20:00 jack1043
Cos (B+C - A) + cos (C+ A-B) + cos( A+B+C)
= 1 + 4 cos A. cos B. cos C.
Answers: 3
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