Trigonometry Examples

$1 - \cos^{2} (20) - \cos^{2} (70)$

Step 1

Apply pythagorean identity.

$\sin^{2} (20) - \cos^{2} (70)$

Step 2

The result can be shown in multiple forms.

Exact Form:

$\sin^{2} (20) - \cos^{2} (70)$

Decimal Form:

$0$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$