Trigonometric ratios
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Trigonometric ratios are ratios of the sides of a right triangle that help in solving problems related to angles and sides. The three basic trigonometric ratios are sine, cosine, and tangent. The sine of an angle is defined as the ratio of the length of the opposite side to the length of the hypotenuse, while the cosine is the ratio of the length of the adjacent side to the hypotenuse. The tangent is the ratio of the length of the opposite side to the adjacent side. These ratios are useful for solving problems involving the measurement of angles and the determination of the lengths of sides in right triangles.