Sine, Cosine and Tangent Ratios
Sides of a Right Angled Triangle
The order in which the names of the sides are determined is listed below:
-The longest side of the triangle is called the Hypotenuse.
-The side opposite to the angle under consideration, in this case A, is called the Opposite.
-The remaining side is called the Adjacent.
Note: the Opposite side is always the side opposite to the angle under consideration.
Sine (Sin) Ratio
The sine of an angle is the ratio of the opposite side, to the hypotenuse side.
Cosine (Cos) Ratio
The cosine of an angle is the ratio of the adjacent side, to the hypotenuse side.
Tangent Ratio
The tangent of an angle is the ratio of the opposite side, to the adjacent side.