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keksiikk
@keksiikk
October 2021
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Решите, пожалуйста: 1) Вычислить Sin69×cos21+cos69×sin21
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Роман1233212002
По формуле sin(a+b) , где а=69° и b=21°
sin(69°+21°)=sin90°=1
2 votes
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Answers & Comments
sin(69°+21°)=sin90°=1