The unit circle is a circle with radius 1, centered on the origin of the coordinate airplane. It’s a basic device in trigonometry, used to outline the trigonometric features and to unravel all kinds of issues. There are a number of other ways to memorize the unit circle, every with its personal benefits and downsides. Some in style strategies embody:
One widespread technique is to make use of the mnemonic SOH CAH TOA, which stands for sine, reverse, hypotenuse, cosine, adjoining, hypotenuse, and tangent, reverse, adjoining. This mnemonic can be utilized to recollect the definitions of the trigonometric features, in addition to the values of the trigonometric features for the particular angles 0, 30, 45, and 60. There are numerous on-line sources demonstrating the way to use this technique.
