Trigonometri Contoh

$\cos^{2} (a) - \sin^{2} (a) = \frac{2 \cos^{2} (a) \cdot \tan (a)}{\tan (2 a)}$

Langkah 1

Gambarkan masing-masing sisi persamaannya.

$y = \cos^{2} (a) - \sin^{2} (a)$

$y = \frac{2 \cos^{2} (a) \cdot \tan (a)}{\tan (2 a)}$

Langkah 2