Trigonometria Exemplos

$\sin (x) + \sin (3 x)$

Etapa 1

Aplique a fórmula do arco triplo do seno.

$\sin (x) - 4 \sin^{3} (x) + 3 \sin (x)$

Etapa 2

Some $\sin (x)$ e $3 \sin (x)$ .

$4 \sin (x) - 4 \sin^{3} (x)$