Since we are using the unit circle, we need to put the 30-60-90 triangle inside the unit circle.
The radius of the circle is also the hypotenuse of the right triangle and it is equal to 1.
We have already seen in the previous lesson that the leg opposite the 30 degrees angle is half the hypotenuse.
Again, we will find the length of vertical black line of the triangle using the pythagorean theorem.
Since 1/2 = 0.5, we will replace 1/2 with 0.5 in the formula to simplify the computation.
1^{2} = 0.5^{2} + y^{2}Mar 13, 19 11:50 AM
Learn how to derive the equation of an ellipse when the center of the ellipse is at the origin.
Basic math formulas
Algebra word problems
New math lessons
Your email is safe with us. We will only use it to inform you about new math lessons.
Recommended
Scientific Notation Quiz
Graphing Slope Quiz
Adding and Subtracting Matrices Quiz
Factoring Trinomials Quiz
Solving Absolute Value Equations Quiz
Order of Operations Quiz
Types of angles quiz
Mar 13, 19 11:50 AM
Learn how to derive the equation of an ellipse when the center of the ellipse is at the origin.