Final answer:
The tangent function is the ratio of the opposite side to the adjacent side in a right triangle.
Step-by-step explanation:
The tangent function is defined as the ratio of the opposite side to the adjacent side in a right triangle. To find the exact value of the tangent function of a given angle, divide the length of the opposite side by the length of the adjacent side.
For example, if the angle is 45 degrees and the lengths of the opposite and adjacent sides are both 1, the tangent function would be 1/1 = 1.
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