Trigonometric - Ratios

There are six trigonometric ratios, sine, cosine, tangent, cosecant, secant and cotangent.

These six trigonometric ratios are abbreviated as sin, cos, tan, cosec, sec, cot.

These are referred to as ratios since they can be expressed in terms of the sides of a right-angled triangle in relation to a specific angle θ. Check the video...