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In triangleABC if angleA=60^@ then show ...

In `triangleABC` if `angleA=60^@` then show that `(b+c)/a=2cos((B-C)/2)`

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PATHFINDER-TRIGONOMETRIC FUNCTIONS-QUESTION BANK
  1. a,b,c are the lengths of sides of triangleABC and 1/(a+c)+1/(b+c)=3/(a...

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  2. In triangleABC show that a=bcosC+ccosB

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  3. In triangleABC if angleA=60^@ then show that (b+c)/a=2cos((B-C)/2)

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  4. For any triangle ABC show that a sin(B-C)+bsin(C-A)+csin(A-B)=0

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  5. In triangleABC angleC=90^@ then show that (a^2+b^2)/(a^2-b^2)sin(A-B)...

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  6. In triangleABC if acos^2(C/2)+c cos^2(A/2)=3b/2 then show that a,b,c a...

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  7. In any triangle ABC show that b^2sin2C+c^2sin 2B=abc/R

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  8. In any triangle ABC show that sinA+sinB gt sin C

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  9. Prove that for any triangle ABC,(cosBcosC)/bc+(cosCcosA)/ca+(cosAcosB)...

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

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  11. for any triangleABC show that (b^2-c^2)/(cosB+cosC)+(c^2-a^2)/(cosC+co...

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  12. if in a triangle ABC ,a^2,b^2,c^2 are in A.P. then show that cotA,cotB...

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  13. In triangle ABC tan(A/2), tan(B/2) and tan (C/2) are in A.P. then prov...

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  14. If in triangleABC ,a^4+b^4+c^4=2c^2(a^2+b^2) then find angleC

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  15. In any triangle ABC if cosA=sinB-cosC then show that any angle of the...

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  16. In any triangle ABC prove that a^2cotA+b^2cotB+c^2cotC=(abc)/R

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  17. in any triangle ABC prove that (b-c)/acos^2(A/2)+(c-a)/(b)cos^2(B/2)+(...

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  18. In triangle ABC if the angles A,B and C be in A.P. then show that 2co...

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  19. In triangle ABC if cosAcosB +sinAsinB sinC=1 then prove that a:b:c=1:1...

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  20. In triangleABC (b+c)/11=(c+a)/12=(a+b)/13 then prove that (cosA)/7=(co...

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