Question

A solução da integral indefinida ∫(cosy∗tangy)dy é:

Answer 1

$\int{(\cos{y}\tan{y})dy}=$

$\int{\bigg(\cos{y}\dfrac{\sin{y}}{\cos{y}}\bigg)dy}=$

$\int{(\sin{y})dy}=\boxed{-\cos{y}+C}$