вспомни sin^2a+cos^2a= 1
tgx=cos^2 5x +sin^2 5x
tgx = 1
x=pi/4+pi*k
tgx - sin^2 5x = cos^2 5x
tgx = sin^2 5x + cos^2 5x
tgx=1
x=arctg 1 + pk
x= p/4 + pk
вспомни sin^2a+cos^2a= 1
tgx=cos^2 5x +sin^2 5x
tgx = 1
x=pi/4+pi*k
tgx - sin^2 5x = cos^2 5x
tgx = sin^2 5x + cos^2 5x
tgx=1
x=arctg 1 + pk
x= p/4 + pk