# What do you need to know about unit circle charts?

## What do you need to know about unit circle charts?

A unit circle chart has sin cos tan sec csc cot ratios. To understand the chart, you need to know them: cotθ equals 1/tanθ. By definition, a radian is an alternative way to measure angles. A single radian is an angle you need.

## How to calculate the equation of a unit circle?

1 Unit circle is a circle of radius 1 unit. 2 The equation of a unit circle is x2+y2 = 1 x 2 + y 2 = 1 3 Refer Table- 1 for important Sin Cos and Tan values of the 1st quadrant.

Which is not present in the unit circle table?

not present Function→ Degree ↓ c cos c cos s sin s csc c 0° 0 0 0 undefined u 30° 3 3 2 3 3 2 3 30° 3 3 2 3 3 2 2 3 45° 2 2 2 2 2 2 2 2 2

### How is the unit circle divided into four quadrants?

And the unit circle is divided into four quadrants at angles of π/2, π. 3π/2, and 2π respectively. Further within the first quadrant at the angles of 0, π/6, π/4, π/3, π/2 are the standard values, which are applicable to the trigonometric ratios.

### How to calculate unit circle angles in cricle chart?

Unit Circle Angles in Unit Circle Chart: In a unit circle, you measure the positive sides of the circle by utilizing the first side of the positive x-axis. At that point, you will instantly move to the terminal side of the circle. The unit circle chart shows the positive points named in radians and degrees.

How to calculate the coordinates of a unit circle?

The unit circle chart shows the position of the points along the unit circle that are formed by dividing the circle into eight and twelve parts. The coordinates of each point can be solved for using the one of the two corresponding special triangles. Figure 1: Unit Circle Chart π (pi)

## Which is the correct value for a unit circle?

To solve the problem, there is no need to get overwhelmed. Simply go back to the unit circle. You will find that the y-coordinate value is ½ at 30°. Because y-coordinate equals sine, we can easily calculate the answer as follows: Sin 30° =1/2. Using the unit circle, get the cosine (x-coordinate) for the problem.