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Cho alpha+ beta+ gamma = pi. Chứng minh A) sin alpha + sin beta + sin gamma = 4cos alpha/2*cos beta/2*cos gamma /2
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Cho alpha+ beta+ gamma = pi. Chứng minh A) sin alpha + sin beta + sin gamma = 4cos alpha/2*cos beta/2*cos gamma /2
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Mathematics
4 years
2021-08-31T10:16:07+00:00
2021-08-31T10:16:07+00:00 1 Answers
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Answer:
It is proved .
Step-by-step explanation:
Take LHS
Hence proved.