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zhaksygeldin01
@zhaksygeldin01
July 2022
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Помогите доказать тождество!30 баллов
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sedinalana
Verified answer
(sin²b+cos²b+2sinbcosb)/(cos²b+2cosbsinb+sin²b)=1
1=1
(sin²b-cos²b)(sin²b+cos²b)/(cos²b-sin²b)=-1
-1=-1
2 votes
Thanks 2
zhaksygeldin01
А откуда вы взяли(sin²b+cos²b+2sinbcosb)? там же 1+2sinbcosb
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Answers & Comments
Verified answer
(sin²b+cos²b+2sinbcosb)/(cos²b+2cosbsinb+sin²b)=11=1
(sin²b-cos²b)(sin²b+cos²b)/(cos²b-sin²b)=-1
-1=-1