Trigonometri Contoh

$\frac{\cos (2 x) + \cos (2 x)}{\sin (x)} - \frac{\sin (2 x) + \sin (2 x)}{\cos (x)} = \frac{\cos (4 x)}{\sin (x) \cos (x)}$

Langkah 1

Persamaan yang disediakan bukan identitas.

$\frac{\cos (2 x) + \cos (2 x)}{\sin (x)} - \frac{\sin (2 x) + \sin (2 x)}{\cos (x)} = \frac{\cos (4 x)}{\sin (x) \cos (x)}$ bukan identitas