In any `DeltaABC`, prove that : `(b^2 + c^2 - a^2)/(c^2 +a^2 -b)^2 = (tan B)/(tan A)`

In any DeltaABC , prove that a(bcosC-c cosB)=(b^(2)-c^(2))

In a triangle ABC, prove that (a^2+b^2-c^2)tan C-(b^2+c^2-a^2)tan A=0

In any DeltaABC , prove that a^(2)sin(B-C)=(b^(2)-c^(2))sinA

In any Delta ABC, prove that : ((a-b)/(c))=(tan((A)/(2))-tan((B)/(2)))/(tan((A)/(2))+tan((B)/(2)))

In any DeltaABC , prove that ((b^(2)-c^(2)))/a^(2)"sin 2a"+((c^(2)-a^(2)))/b^(2)" sin 2B+"((a^(2)-b^(2)))/c^(2)"sin 2C=0"

In DeltaABC , prove that: sin(B-C)/(2)=(b-c)/(a).cosA/2

In any Delta ABC, prove that :tan((A)/(2)+B)=(c+b)/(c-b)tan((A)/(2))

In any DeltaABC , prove that ((a+b))/csin""C/2=cos""((A-B))/2

In any DeltaABC , prove that (a-b)^(2)cos^(2)""C/2+(a+b)^(2)sin^(2)""C/2=c^(2).

In any triangle ABC, prove that: (b-c)/(b+c)=(tan((b-C)/(2)))/(tan((B+C)/(2)))