How are the special right triangle identities (like 45°-45°-90° and 30°-60°-90°) used to find the coordinate points around the unit circle?

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pink.1d · Answer

I'll fan and medal. Please help ASAP :)

ddcamp · Answer

With special triangles, if you know one length, you can find the other two.

In the unit circle, we know that the hypotenuse (which is the radius) will always be length 1 (that's the definition of the unit circle).

So, since we know the hypotenuse is 1, if we know the angles in the triangle, we can find the length and height of the triangle. These are the coordinates on the circle.|dw:1432497263341:dw|

pink.1d · Answer

Thanks @DDCamp heres your medal :)