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MegaWelt
@MegaWelt
August 2022
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sin (-45)^2 + 2sin (-60) * cos (-30) * tg (-45)
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yarovoe
Sin² (-45)° - 2sin 60°· cos 30° ·(- tg 45°)=Sin² (45)° + 2sin 60°· cos 30°·
tg 45°=√(2/2)²+2·√3/2·√3/2·1=1/2+2·3/4=1/2+3/2=4/2=2
2 votes
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MegaWelt
Спасибо! ;)
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Answers & Comments
tg 45°=√(2/2)²+2·√3/2·√3/2·1=1/2+2·3/4=1/2+3/2=4/2=2