Trigonometry Examples

$\cos (2 x) \cos (x) - \sin (2 x) \sin (x) = \frac{\sqrt{3}}{2}$

Step 1

The result can be shown in multiple forms.

Exact Form:

$\cos (2 x) \cos (x) - \sin (2 x) \sin (x) = \frac{\sqrt{3}}{2}$

Decimal Form:

$\cos (2 x) \cos (x) - \sin (2 x) \sin (x) = 0.86602540 \dots$