Question

Cos(teta) 5/2 = sen (teta) por favor

Answer 1

teta = x
$\cos(x) \times \frac{5}{2} = \sin(x) \\ \frac{ \cos(x) }{ \sin(x) } = \frac{2}{5}$
entonces
$\cos(x) = 2k \\ \sin(x) = 5k$