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Anya988
@Anya988
August 2021
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cos 110+cos105+cos100 записать в виде произведения
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rima134
Verified answer
Cos110+cos105+cos100=(cos110+cos100)+cos105=2cos(110-100)/2cos(110+100)/2+cos105=2cos5cos105+cos105=cos105(2cos5+1)
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Answers & Comments
Verified answer
Cos110+cos105+cos100=(cos110+cos100)+cos105=2cos(110-100)/2cos(110+100)/2+cos105=2cos5cos105+cos105=cos105(2cos5+1)