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ksysha2134
@ksysha2134
August 2022
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Даю 20 баллов помогите пожалуйста!!!
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iosiffinikov
Числитель ((sina) ^2-(cosa)^2)*((sina) ^2+(cosa)^2)+(cosa)^2)=(sina) ^2=4sin(a/2)^2*cos(a/2)^2
Знаменатель 2*(1-(cos(a/2))^2+(sin(a/2)) ^2)=4*sin(a/2)^2
Отношение даст правую часть.
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Answers & Comments
Знаменатель 2*(1-(cos(a/2))^2+(sin(a/2)) ^2)=4*sin(a/2)^2
Отношение даст правую часть.