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stassay
@stassay
August 2022
2
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cos 70° - sin 140° - cos 10°
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arinapod
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0.4921510727
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2 votes
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barsugachev
Cos60-sin140=cosП/3-sin7П/9=sinП/6-sin7П/9=sin(-11П/18)=sin(-110)=-sin(110)=sin(90+30)=sin30=1/2
3 votes
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barsugachev
ae[
barsugachev
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barsugachev
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0.4921510727
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