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IF `alpha,beta,gamma` are the lengths of the altitudes of `Delta ABC`, then `1/alpha+1/beta-1/gamma-(2ab)/((a+b+c)Delta)cos^2""C/2=`

A

`0`

B

` 1`

C

` 2s `

D

`Delta `

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A
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - II
  1. In Delta ABC, (cos A)/(c sin B)+(cos B)/( a sin C)+(cos C)/( b sin A)=

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

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

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

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

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  6. If the base angles of a triangle are 22 (1^(0) )/(2) , 112 (1^(0))/(2...

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  7. In Delta ABC, if 8R^(2) = a^(2) + b^(2) + c^(2), then the triangle is ...

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  8. In Delta ABC, if cos A+cos B+ cos C=3//2, then the triangle is

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  9. In a triangle ABC, fi Tan A + Tan B + Tan C = 6 and Tan A Tan B = 2 th...

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  10. If sin A cos B = (1)/(4) and 3 tan A = tan B then triangle is

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  11. If sin A , sin B are roots of c^(2) x^(2) - c ( a+b) x + ab = 0 , ...

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  12. In Delta ABC, if sin A+sin B+sin C=1+sqrt2 and cos A+cos B+cos C=sqrt2...

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  13. If sin A= sin^2 B and 2 cos^2 A=3 cos^2 B, then the Delta ABC is

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  14. Two sides of a triangles are given by the roots of the equation x^(2)...

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  15. In Delta ABC, if tan B tan C+tan C tan A+tan A tan B=sqrt3 tan A tan B...

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  16. IF Delta ABC, if cot""A/2=(b+c)/a, then the triangle is

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  17. In Delta ABC if a^2+b^2+c^2=ca+ab sqrt3 then the triangle is

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  18. In Delta ABC, if cos A cos B+ sin A sin B sin C=1, then the triangle i...

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  19. The perimeter of a triangle is 16 cm. One of the sides is of length 6 ...

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  20. sum (a)/( s-a) (tan ""(B)/(2) - tan ""(C )/(2)) =

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