Unit Circle Calculator
The unit circle is a circle centered at the origin, (0, 0) and its radius is 1.
What is Unit Circle Calculator?
'Cuemath's Unit Circle Calculator' is an online tool that helps to calculate the sine, cosine, and tangent values. Cuemath's online Unit Circle Calculator helps you to calculate the sine, cosine, and tangent values in a few seconds.
Note: Enter an angle in degrees only.
How to Use Unit Circle Calculator?
Please follow the below steps to find the sine, cosine, and tangent values:
- Step 1: Enter the angle of the unit circle in the given input boxes.
- Step 2: Click on the "Calculate" button to find the sine, cosine, and tangent values.
- Step 3: Click on the "Reset" button to clear the fields and enter the different values.
How to Find Unit Circle Calculator?
The general equation of a circle whose center is (x1, y1) and whose radius is r is given by the formula:
(x - x1)2 + (y - y1)2 = r2, Where (x, y) are the coordinates of any point lying on the unit circle.
The unit circle is circle center at origin(0, 0) and radius = 1, then the equation of the unit circle is given by the formula:
(x - 0)2 + (y - 0)2 = 12
x2 + y2 = 1
We calculate the trigonometric functions sine, cosine, and tangent using a unit circle.
From the image, we can calculate trignometric values for any angle.
sinθ = Opposite / Hypotenuse = y / 1
sinθ = y, sine is y-coordinate
cosθ = Adjacent / Hypotenuse = x / 1
cosθ = x, cosine is x-coordinate
tanθ = Opposite / Adjacent = y / x
tanθ = y / x
Using pythagoras theroem, x2 + y2 = 1
Therefore, cos2θ + sin2θ = 1
Lets see an example to understand briefly.
Find the trignomteric values if the angle of the unit circle is 45°?
sin45° = 1 / √2 = 0.7071
cos45° = 1 / √2 = 0.7071
tan45° = 1
Similarly, you can use the calculator to find the sine, cosine, and tangent values for:
- Angle of unit circle = 60°
- Angle of unit cirlce = 30°