Why is it important???

You may be wondering why we even need to know about the Unit Circle.
Since the Unit Circle is so simple, you can learn more about finding lengths and angles. Also, the unit circle is an easy, simple way to learn the sine, cosine, and tangent of angles (the unit circle is fundamental for trigonometry). Therefore, you can also find the cosecant, secant, and cotangent of angles, which are the reciprocals of sine, cosine, and tangent respectively.The Unit Circle also uses radians, which are used in other math concepts.