Question

Para todo x \in \mathbb{R}, a expressão [\cos(2x)]^2\,[\operatorname{sen}(2x)]^2 \operatorname{sen} x é igual a:

Accepted Answer

2^{-4}\,[2\operatorname{sen} x + \operatorname{sen}(7x) - \operatorname{sen}(9x)]

Answer

2^{-4}\,[\operatorname{sen}(2x) + \operatorname{sen}(5x) + \operatorname{sen}(7x)]

Answer

2^{-4}\,[-\operatorname{sen}(2x) - \operatorname{sen}(3x) + \operatorname{sen}(7x)]

Answer

2^{-4}\,[-\operatorname{sen} x + 2\operatorname{sen}(5x) - \operatorname{sen}(9x)]

Answer

2^{-4}\,[\operatorname{sen} x + 2\operatorname{sen}(3x) + \operatorname{sen}(5x)]

ITA 2003 — Questão 13

Explicação detalhada da IA