Then it shows how to use the sine formula the SOH formula. Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations. With trigonometry, you always work in right-angled triangles. In these triangles you have three sides, of which two intersect at a right angle. These sides are called shorter sides. The shorter side that is opposite of the angle you look from is called the opposite shorter side.
This side is not an arm of the angle you are looking from. The shorter side that is intersecting with the angle you look from is called the adjacent shorter side. In this animation the hypotenuse is 1, making the Unit Circle. Notice that the adjacent side and opposite side can be positive or negative, which makes the sine, cosine and tangent change between positive and negative values also.
It will help you to understand these relatively simple functions. You can also see Graphs of Sine, Cosine and Tangent. To complete the picture, there are 3 other functions where we divide one side by another, but they are not so commonly used.
They are equal to 1 divided by cos , 1 divided by sin , and 1 divided by tan :.
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