A,B,C are three angles of a triangle and `"sin" (A+c/2)= n "sin" C/2`
`"tan" A/2 "tan" B/2 =`

A,B,C are three angles of a triangle and "sin" (A+c/2)= n "sin" C/2 ("sin"C/2)/("cos"(A-B)/2)=

If A, B, C are the angles of a triangle then tan ((B+C)/2)=

If A, B, C are the angles of a triangle, then sin 2A + sin 2B - sin 2C is equal to

If A, B, C are the angles of a triangle, then sin 2A + sin 2B - sin 2C is equal to

If A,B and C are the angles of a plain triangle and tan(A/2)=1/3 , tan(B/2)=2/3 , then tan(C/2) is equal to

If A, B, C are the angles of a triangle such that "cot"(A)/(2)="3 tan"(C )/(2) , then sin A, sin B, sin C are in

If A, B, C are the angles of a triangle such that sin^(2)A+sin^(2)B=sin^(2)C , then

If A, B, C are the angles of a triangle such that sin^(2)A+sin^(2)B=sin^(2)C , then