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Iamsostupid
@Iamsostupid
August 2022
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Ребята, очень нужна помощь с математикой
Нужно упростить:
cos5xsin3x-cos3xsin5x
sin2A(альфа)/1 - sin(квадрат)А(альфа)
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Answers & Comments
газмет
Cos(5x)sin(3x) = cos(3x)sin(5x) = sin(3x-5x) = sin(-2x) = -sin(2x)
sin(2a)/1-sin^2(a) = 2*sin(a)*cos(a)/1-sin^2(a) = 2*sin(a)cos(a)/cos^2(a) = 2*sin(a)/cos(a) = 2*tg(a)
2 votes
Thanks 1
iosiffinikov
Первое выражение это sin(3x-5x)=-sin(2x)
Второе: sin2A/(1-sin(A)*sin(A))=2sinA*cosA/(cos(A)*cos(A))=2*tg(A)
1 votes
Thanks 1
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Answers & Comments
sin(2a)/1-sin^2(a) = 2*sin(a)*cos(a)/1-sin^2(a) = 2*sin(a)cos(a)/cos^2(a) = 2*sin(a)/cos(a) = 2*tg(a)
Второе: sin2A/(1-sin(A)*sin(A))=2sinA*cosA/(cos(A)*cos(A))=2*tg(A)