Mathematics, 26.10.2020 05:30, evere11605
What is the exact value of Cosine (StartFraction 11 pi Over 21 EndFraction) cosine (StartFraction pi Over 7 EndFraction) minus sine (StartFraction 11 pi Over 21 EndFraction) sine (StartFraction pi over 7 EndFraction)?
Negative StartFraction StartRoot 3 EndRoot Over 2 EndFraction
Negative one-half
One-half
StartFraction StartRoot 3 EndRoot Over 2 EndFraction
Answers: 3
and B = 
in the identity,
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What is the exact value of Cosine (StartFraction 11 pi Over 21 EndFraction) cosine (StartFraction pi...
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