## sin(90°)

### The sine of 90°, denoted as sin(90°), is equal to 1

The sine of 90°, denoted as sin(90°), is equal to 1.

In trigonometry, sine is one of the fundamental trigonometric functions. It is defined as the ratio of the length of the side opposite to an acute angle in a right triangle to the length of the hypotenuse.

In the case of a right triangle with a 90° angle (a right angle), the side opposite to this angle is the longest side of the triangle, called the hypotenuse. As a result, for any right triangle with a 90° angle, sin(90°) is always equal to 1.

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