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AnastasiaPodlesnaya
@AnastasiaPodlesnaya
July 2022
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1)sin²24+cos²24;
2)cos²65+sin²115.
Help me pleaseeee❣
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kmike21
Verified answer
1)sin²24+cos²24=1. Исползована формула sin²α+cos²α=1
2)cos²65+sin²115=cos²65+sin²(180-65)=cos²65+sin²65=1
использована формула приведения sin(180-α)=sinα
3 votes
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Answers & Comments
Verified answer
1)sin²24+cos²24=1. Исползована формула sin²α+cos²α=12)cos²65+sin²115=cos²65+sin²(180-65)=cos²65+sin²65=1
использована формула приведения sin(180-α)=sinα