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.

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Q:
## What is cos 30 degrees?

A: The cosine of 30 degrees is 0.86. It is also expressed as the square root of three divided by two. The cosine of an angle is calculated by dividing the len... 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:
## What is arctan(2)?

A: The arc tangent (arctan) of 2 degrees is 63.43, while the arctan of 2 radians is 1.107. The function arctan(2) can also be described as the inverse tangent... Full Answer >Filed Under: -
Q:
## What is arctan(x) in math?

A: The function arctan(x) describes the inverse tangent of x, wherein the ratio between the length of the sides opposite and adjacent to the angle can be used... Full Answer >Filed Under: