Trigonometry functions |
Consider the following right angle triangle:  Trigonometric functionsSine function - defines the ratio of the opposite leg of the triangle to the hypotenuse. Thus in mathematical terms, this can be written as: Cos A = Opposite / Hypotenuse = a / c Cosine function - defines the ratio of the adjacent leg of the triangle to the hypotenuse. Thus in mathematical terms, this can be written as: Sin A = Adjacent / Hypotenuse = b / c Tangent function - defines the ratio of the opposite leg of the triangle to the Adjacent leg. Thus in mathematical terms, this can be written as: Tan A = Opposite / Adjacent = a / b = Sin A / Cos A Do not be intimidated by the Sin A / Cos A in the above formula, even though it looks complicated, it is really simple to understand. Here is how they arrived a that formula: Sine A = a / c Do not worry too much for now just know the formulas and how they relate to the triangle. In the next few postings we will take a detailed look at how to calculate the size of an angle and length of sides using trigonometric functions. |
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