Question

How does the unit circle work?

Answer 1

circle add up to 360 angle
there are 2 ways to find sin cos or tan in the circle
first ) memorize
or
2n) learn the method

Answer 2

2nd way ) using right triangle 90-45-45
or 90-60-30 triangle
let's say you need sin 45 degree
you should make a triangle near to the x-axis
radius of circle is always going to be one!

Answer 3

blue one is a hypotenuse side of right triangle which is also radius of circle so that's why it's 1 and both other sides of right triangle are going to be same