Question

The definitions of sine, cosine, and tangent

Answer 1

 sine:  the trigonometric function that is equal to the ratio of the side opposite a given angle (in a right triangle) to the hypotenuse.
cosine: the trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.
tangent: a straight line or plane that touches a curve or curved surface at a point, but if extended does not cross it at that point.

Answer 2

Sine=$\frac{opposite}{hypotenuse}$ Cosine=$\frac{adjacent}{hypotenuse}$ tangent=$\frac{opposite}{adjacent}$