Trignometric Ratios

As we all know that Trignometry is one important branch of Mathematics. Trignometry means the science of measuring triangles. It deals with the measurements of the sides and the angles of a triangle and the problems allied with angles.

Trignometric Ratios: Here we find the remaining sides and angles of a triangle when some of its sides and angles are given. This problem is solved by using some ratios of the sides of a triangle with respect to its acute angles. These ratios of acute angles are called trignometric ratios of angles.

The are six trignometric ratios as follows:-

Ratio 1:- Sin θ = Perpendicular/ Hypotenuse

Ratios 2:- Cosine θ = Base/Hypotenuse

Ratio 3:- Tangent θ = Perpendicular/Base

Ratio 4:- Cosecant θ = Hypotenuse/Perpendicular

Ratio 5:- Secant θ = Hypotenuse/Base

Ratio 6:- Cotangent θ = Base/Perpendicular

Note that these trignometric ratios are defined for an acute angle θ.