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In any Delta ABC, If cot ""A/2 , cot ...

In any `Delta ABC`, If `cot ""A/2 , cot ""B/2 ,cot ""C/2 ` are in AP, then `a,b,c` are in

A

A.P.

B

G.P.

C

H.P.

D

none of these

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The correct Answer is:
A
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OBJECTIVE RD SHARMA ENGLISH-PROPERTIES OF TRIANGLES AND CIRCLES CONNECTED WITH THEM-Exercise
  1. In any DeltaABC, is 2 cos B=a/2, then the triangle is

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  2. If in a triangle ABC ,a sin A=b sin B, then the triangle, is

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  3. In any Delta ABC, If cot ""A/2 , cot ""B/2 ,cot ""C/2 are in AP, t...

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  4. In any triangle ABC b^(2)sin2C+c^(2)sin2B=

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  5. If in a triangle ABC, (cosA)/a=(cosB)/b=(cosC)/c,then the triangle is

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  6. If in a triangle ABC, triangle = a^(2) - (b-c)^(2), then tanA is equal...

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  7. If the angles A,B,C of a triangle are in A.P. and sides a,b,c, are in ...

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  8. In a triangle, the lengths of the two larger sides are 10 and 9, res...

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  9. There exist a triangle ABC satisfying

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  10. In a triangle, the length of two larger sides are 24 and 22 respective...

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  11. If in a triangle A B C ,acos^2(C/2)+ c cos^2(A/2)=(3b)/2, then the si...

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  12. If twice the square of the diameter of the circle is equal to half the...

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  13. In triangle ABC, angle A is greater than angle B. If the measure of an...

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  14. (2cosA)/(a) + (cosB)/b + (2cosC)/c=a/(ac) + b/(ca), then the values of...

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  15. If Agt0,Bgt0and A+B=(pi)/(6), then the minimum value of tan A+tanB, is

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  16. If cos(theta-alpha),costheta,cos(theta+alpha) are in H.P.,then costhe...

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  17. If sin beta is the GM between sin alpha and cos alpha, then cos 2beta...

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  18. If sinA=sin^2B and 2cos^2A=3cos^2B then the triangle ABC is

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  19. If in a triangleABC , (sinA+sinB+sinC)(sinA+sinB-sinC)=3sinAsinB the...

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  20. In a Delta ABC, sin A + sin B + sin C = 1 + sqrt(2) and cos A+cos B+co...

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