Trigonometri Contoh

$\frac{(\sin (8 a) - \sin (2)) \cdot (\cos (2 a) - \cos (8 a))}{1 - \cos (6 a)}$

Langkah 1

Kalikan $\sin (8 a) - \sin (2)$ dengan $\cos (2 a) - \cos (8 a)$ .

$\frac{(\sin (8 a) - \sin (2)) (\cos (2 a) - \cos (8 a))}{1 - \cos (6 a)}$