Trigonometry Examples

$\sin (4 x) = 8 \cos^{3} (x) \sin (x) - 4 \cos (x) \sin (x)$

Step 1

Graph each side of the equation. The solution is the x-value of the point of intersection.

$x \approx 0, - 0.1, 0.1, \frac{1}{5}, 0.3, \frac{2}{5}, - \frac{1}{2}$

Step 2

The result can be shown in multiple forms.

Exact Form:

$x \approx 0, - 0.1, 0.1, \frac{1}{5}, 0.3, \frac{2}{5}, - \frac{1}{2}$

Decimal Form:

$x \approx 0, - 0.1, 0.1, 0.2, 0.3, 0.4, - 0.5$

Step 3