Question

Sabendo que Sen x = (2√13)/13 e Cos x = (3√13)/13. Qual o valor do Sen 2x ?*​

Answer 1

Vamos là.

sen(2x) = 2*sen(x)*cos(x)

sen(2x) = 2* (2√13)/13 *  (3√13)/13

sen(2x) = 12/13