Trigonometric cosine calculator.

**How to use :-** In order to calculate cos(x) on the calculator:

- Enter the input angle.
- Select angle type of degrees (°) or radians (rad) in the combo box.
- Press the = button to calculate the result.

**How to use :-** Enter the cosine value, select degrees (°) or radians (rad) and press the = button:

The cosine function, along with sine and tangent, is one of the three most common trigonometric functions. In any right triangle, the cosine of an angle is the length of the adjacent side (A) divided by the length of the hypotenuse (H). ... Use your calculator to find the cosine of 30��

The Inverse Cosine function is the inverse of the Cosine function and is used to obtain the value of angles for a right-angled triangle.