ABSTRACT
C
a b c c
sin sin sin . (Law of Sines)= =
= + −2 2 2 2 b A
a b
a b
A B
cos . (Law of Cosines)
tan
tan
+ − = +
1 2 ( ) 1 2 ( )A B−
. (Law of Tangents)
sin , where s a b c .
cos 1
2 A
s b s c
bc = − − = + +( )( ) ( )
A s s a
bc
A s b s c
s s a
Area
= −
= − − −
=
( )
( )( )
( )
.
