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Хопхэйлалалэй1303
@Хопхэйлалалэй1303
July 2022
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sina/2=-1/2 cosa/2-? ctga/2-?
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nyanCATNYN
(1-sin²a-2sinacosa-cos²a):(sinacosa-cosa/sina)=
=(-2sinacosa)*sina/[cosa(sin²a-1)]=-2sin²a*cosa/[cosa*(-cos²a)=2tg²a
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=(-2sinacosa)*sina/[cosa(sin²a-1)]=-2sin²a*cosa/[cosa*(-cos²a)=2tg²a