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In Delta ABC, if sin^2""A/2, sin^2""B/2,...

In `Delta ABC, if sin^2""A/2, sin^2""B/2,sin^2""C/2` are in H.P, then a,b,c in

A

A.G.P.

B

G.P.

C

A.P.

D

H.P.

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - II
  1. In Delta ABC ,if 5 cos C + 6 cos B = 4 and 6 cos A + 4 cos C = 5 " th...

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  2. In a triangle ABC, (s-a)/11=(s-b)/12=(s-c)/13, then tan^2 (A//2)=

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  3. In Delta ABC, if sin^2""A/2, sin^2""B/2,sin^2""C/2 are in H.P, then a,...

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  4. In Delta ABC, if tan A, tan B, tan C are in H.P., then a^2,b^2,c^2 are...

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  5. If in Delta ABC the sides a,b,c are in A.P. Then

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  6. If the altitudes of a triangle are in arithmetic progression, then the...

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  7. In Delta ABC if b=20,c=21 and sin A=3//5, then a=

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  8. In Delta ABC, if sin A: sin C=sin (A-B): sin (B-C), then a^2,b^2,c^2 a...

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  9. If cot ""^(A)/(2) : cot ""(B) /(2) : cot "" ( C )/(2) = 1: 4: 15 , ...

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  10. If sin A : sin B : sin C = 3: 4: 5 then tan ""(A)/(2) : tan ""(B)/(2...

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  11. In Delta ABC, if tanA: tan B: tan C=1:2:3, then sin A: sin B: sin C=

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  12. In Delta ABC if a: b: c = 7 : 8: 9 , then cos A : cos B : cos C =

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  13. Area of triangle ABC is a^(2) - (b-c)^(2) then tan A =

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  14. a^(2) cot A+ b^(2) cot B+ c ^(2) cot C =

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  15. In a triangle , if the larger side is 7 and one of the angle is 120 ^...

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  16. In Delta ABC, (cos A)/(c sin B)+(cos B)/( a sin C)+(cos C)/( b sin A)=

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  17. If alpha,beta,gamma are the lengths of the altitudes of Delta ABC, the...

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  18. IF alpha,beta,gamma are the lengths of the altitudes of Delta ABC, the...

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  19. If alpha,beta,gamma, are lengths of the altitudes of a triangle ABC wi...

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  20. In Delta ABC, B = 45 ^(@) , C = 120 ^(@) , a= 40 cm, the length of ...

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