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220682
@220682
July 2022
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Tg 165/1-tg2 165 найдите значение выражения 1+ Cos b/ 2 cos b/2 упростить заданное выражение
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mymurkin
1/2*2tg165/1-tg²165=1/2tg330=1/2tg(360-30)=1/2*(-tg30)=-√3/6
1+cosb/2cosb/2=2cos²b/2/2cosb/2=cosb/2
2 votes
Thanks 3
220682
Большое спасибо но у нас будут еще примеры
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1+cosb/2cosb/2=2cos²b/2/2cosb/2=cosb/2