Q:
# What Is Sin 90 Degrees?

**Sin 90 degrees is equal to one.** This degree value can also be expressed in radians as sin(?/2) = 1. This value of the sine function corresponds to one-fourth of the complete arc distance along the unit circle.

Radians are a unit of angular measurement that describe an angle in terms of the length of a corresponding arc on the unit circle. Radians are found using the length of the arc divided by the radius of the arc. There are 360 degrees in a complete unit circle, which is equal to 2? radians. This means that 90 degrees is equal to ?/2 radians and this gives sin(?/2) a value of 1.

Learn more about Trigonometry-
Q:
## How Do I Calculate the Incline of a Treadmill?

A: The incline of a treadmill in degrees is not the same as the gradient, which is given in percentage, and some treadmills do not display either figure. Calc... Full Answer >Filed Under: -
Q:
## What Is Cos 0 Degrees Equal To?

A: The cosine of zero degrees is equal to one. The cosine is a trigonometric function that can be defined through the Pythagorean Theorem as the length of the... Full Answer >Filed Under: -
Q:
## How Do You Use a Unit Circle With Tangent Chart?

A: A unit circle can help solve values for the tangent of angles 30 degrees, 45 degrees and 60 degrees. Tan (θ) = x/y, sin (θ) = y and cos (θ) = x. By substit... Full Answer >Filed Under: -
Q:
## How Many Degrees Are in a Quadrilateral?

A: There are 360 degrees in a convex quadrilateral. A convex quadrilateral is made up of four sides and four corners, or angles. None of the angles bend inwar... Full Answer >Filed Under: