Properties of Triangles
Consider a triangle ABC.it has three angles A,B and C.The sides opposite to the angles A,B,C are denoted by the corresponding small letters a,b,c respectively.
Thus a=BC,b=CA,c=AB in the fig. shown below.
Sine Formula :
a/sina = b/sinB=c/sinc=2R Where R,is a Radius of Circle circum circle of the triangle.
Napier's Formulae :


a/sina = b/sinB=c/sinc=2R Where R,is a Radius of Circle circum circle of the triangle.
Napier's Formulae :

Cosine Formulae:
- a2=b2+c2 -2bc cosA
- b2=c2+a2 -2ca cosB
- c2=a2+b2 -2ab cosC
- a =bcosC+ccosB
- b=ccosA+acosC
- c=acosB+bcosA

Area Formulae:
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