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In any triangle `A B C` , prove that following: `\ \ asin(A/2)sin((B-C)/2)+bsin(B/2)sin((C-A)/
For any triangle ABC, prove that `sin(B-C)/sin(B+C)=(b^2-c^2)/(a^2)`...
For any triangle ABC, prove that `(b^2-c^2)/(a^2)sin2A+(c^2-a^2)/(b^2)sin2B+(a^2-b^2)/(c^2)sin2C...
For any triangle ABC, prove that `a(bcosC-c cosB)=b^2-c^2`...
In any triangle `A B C ,` prove that: `(b-c)/(b+c)=(tan((B-C)/2))/(tan((B+C)/2))`
PROVE THAT (b^2-c^2)/a^2= sin(B-C)/sin(B+C)
For any triangle ABC, prove that `sin(B-C)/2=(b-c) /a ( cosA/2)`...
For any triangle ABC, prove that `a(bcosC-c cosB)=b^2-c^2`...