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}May 21, 17 09:19 PM
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May 21, 17 09:19 PM
Sharpen your math skills by grade here with crystal clear lessons