Trigonometry Functions. Mr. Causey explains the six basic trigonometry functions sine, cosine, tangent, cosecant, secant and cotangent. Then he shows you how to use the ratios. http://www.mrcausey.com
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Trigonometry is the ratio of the sides of a right triangle. The ratio of the side opposite an angle and the hypotenuse is the sine. The ratio of the side adjacent and the hypotenuse is the cosine and the ratio of the side opposite and the side adjacent is the tangent.