Trigonometric Ratios:-

Today in this article I will explain on what are trigonometric ratios, trigonometric identities, ans trigonometric angles, hope these will help a lot for on going school children.

**What is trigonometry?

Answer:-

The word trigonometry is a greek word in which trigonon means (objects which have three angle here it is triangle)metron means measurement. So measurement of angles of a triangle is trigonometry.

**Trigonometry Ratios:

Answer:-

Let, ABC is a right angled triangle at B, whose hypotenuse= h = AC

            perpendicular = p = AB

            base =b =BC

and measure of unknown angle(say<C) =θ
∴  SinC = Sin θ = p/h = AB/AC     [where,<B=90°]
∴ Cos C = Cos θ = b/h = BC/ AC [where,<B=90°]
∴ TanC = Tan θ = p/b =AB/BC [ where <B=90°]

  Cosec C = Cosec θ = h/p = AC/AB [where <B=90°]
 Sec C = Sec θ =h/b =AC/ BC [where <B=90°]
Cot C= Cot θ = b/p = BC/ AB [where <B=90°]
Tanθ =Sinθ/Cosθ
Cotθ = Cosθ/Sinθ
  

**Reciprocals of trigonometric ratios:-

 To Read.......