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Prove that in any /\ABC.(b-c)cot(A/2)+(c...

Prove that in any `/_\ABC`.`(b-c)cot(A/2)+(c-a)cot (B/2)+(a-b)cot (C/2)=0`

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For any triangle ABC prove that (b-c)cot(A/2)+(c-a)cot(B/2)+(a-b)cot(C/2) =0

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UNITED BOOK HOUSE-ANNUAL EXAMINATION QUESTION PAPERS 2018-EXERCISE
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  2. Let A={x in N:x^2-5x+6=0}.B={x in W:0lex<2}and C={x in N:x<3},then ver...

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  3. Prove that in any /\ABC.(b-c)cot(A/2)+(c-a)cot (B/2)+(a-b)cot (C/2)=0

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  4. Solve secx-tanx=sqrt3

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  19. p: If x is a real number such that x^3+4x=0,then x=0,prove that p is t...

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