Trigonometric Ratios

Trigonometric Ratios:-

There are only six possible ratios of sides of a right angled triangle.

In Trigonometry, different names are given to those ratios of right angled triangle w.r.t. angle ∠θ

These are the ratios:-

{1}. P/H :- Sine (sin)

{2}. B/H :- Cosine (Cos)

{3}. P/B :- tangent (tan)

{4}. H/P :- Cosecant (cosec)

{5}. H/B :- Secant (Sec)

{6}. B/P :- Cotangent (Cot)

where

P :- Perpendicular

B:- Base

H:- Hypotenuse

source: Wikipedia

Some simple identities:

⇒tanϴ = 1/ cotϴ or sinϴ/ cosϴ

⇒Cosecϴ = 1/ sinϴ

⇒Secϴ = 1/ cosϴ

⇒Cotϴ = 1 / tanϴ or cosϴ/ sinϴ

ANAND KUMAR UPADHAYAY