Question

cos² 30 - sin² 30 find the value​

Answer 1

cos² 30° - sin² 30°

= (√3/2)² -(1/2)²

$= \frac{3}{4} - \frac{1}{4} \\ = \frac{3 - 1}{4} \\ = \frac{2}{4} \\ = \frac{1}{2}$