Trigonometry Examples

$\cos (90 - 72)$

Step 1

Subtract $72$ from $90$ .

$\cos (18)$

Step 2

The result can be shown in multiple forms.

Exact Form:

$\cos (18)$

Decimal Form:

$0.95105651 \dots$

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