calcular: a) sen (2x) / cos (x) = dx ; b) sen^2 (x) / cos^4 (x) = dx?

Answer 1

Que vem a ser o dx, derivada?

sen (2x) = 2.sen(x).cos(x)

Logo,
2.sen(x).cos(x)/cos(x) = dx
o que equivale a
2.sen(x) = dx


sen^2 (x) / cos^4 (x) = dx
sen^2 (x) / cos^2 (x).cos^2 (x) = dx
1/cos^2 (x) = dx
o que equivale a
sec^2(x) = dx