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Валенок453
@Валенок453
August 2021
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Люди, помогите пожалуйста! Срочно!
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PONYSWAG
1-sin^2a(1+cos^2a/sin^2a)=1-sin^2a sin^2a+cos^2a/sin^2a=1-1=0
(tga*ctga-cos2a)*1/sin2a = ((tg(a)*ctg(a)+sin)2*a)+cos(2*a) =1+ cos(2*a)+2*sin(a)*cos(a)=2*(cos(a))^2+2*sin(a)*cos(a)=2*cos(a)*(cos(a)+sin(a))=2*cos(a)*(sin(90-a)+sin(a))=2*cos(a)*2*sin(45)*cos(45-a)=2*(2^0,5)*cos(a)*cos(45-a)=(2^0,5)*(cos(45)+cos(45-2*a))=1+(2^0,5)*cos(45-2*a)
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Answers & Comments
(tga*ctga-cos2a)*1/sin2a = ((tg(a)*ctg(a)+sin)2*a)+cos(2*a) =1+ cos(2*a)+2*sin(a)*cos(a)=2*(cos(a))^2+2*sin(a)*cos(a)=2*cos(a)*(cos(a)+sin(a))=2*cos(a)*(sin(90-a)+sin(a))=2*cos(a)*2*sin(45)*cos(45-a)=2*(2^0,5)*cos(a)*cos(45-a)=(2^0,5)*(cos(45)+cos(45-2*a))=1+(2^0,5)*cos(45-2*a)