Using a unit circle is a very easy skill to master. As long as you know sine, cosine, and tangent it will be as simple as pie. For example, if you are looking for the sine, cosine, and tangent of 30, first, to find the sine of 30, look at the y coordinate above the sine of 30. Next, for the cosine of 30, look at the x coordinate of the numbers above 30. The trickiest part, by far, is tangent. So, to find the tangent of 30, take the sine and divide it by the cosine, and that will get you the tangent.
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AuthorMy name is Evelyn Bradley and I'm in pre calculus! Archives
April 2015
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