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r("cot"(A)/(2)"cot"(B)/(2)"cot"(C)/(2))=...

`r("cot"(A)/(2)"cot"(B)/(2)"cot"(C)/(2))=`

A

`Delta`

B

s

C

2s

D

`2Delta`

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-PROPERTIES OF TRIANGLES-PRACTICE SHEET (EXERCISE-III) (LEVEL-II) (Straight Objective Type Questions)
  1. In DeltaABC, 4R "sin"(A)/(2)"sin"(B)/(2)"sin"(C)/(2)=

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  2. ( a cos A + b cos B + c cos C )/( a +b +c ) =

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  3. r("cot"(A)/(2)"cot"(B)/(2)"cot"(C)/(2))=

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  4. In DeltaABC, if a=26, b=30 conc C=63//65 then r(1):r(2):r(3)=

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  5. In triangle ABC r=(R)/(6) and r(1)=7r. Then the mesaure of angle A=

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  6. In DeltaABC if C=90^(@), 1+sinA-sinB=

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  7. If 3R=4r, then cosA+cosB+cosC=

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  8. In triangle ABc, if A-B=120^(@) and R=8r where R r have their usual m...

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  9. In triangle ABC, base BC and area of triangle D are fixed. Locus of th...

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

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  11. If 3, 10 and 15 are the altitudes of a triangle then area of incircle ...

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  12. In a triangle ABC a = 7, b = 8, c = 9 BD is the median and BE is the a...

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  13. If h(1),h(2),h(3) are lengths of altitudes of a Delta^("le")ABC and r ...

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  14. The lengths of medians of a right angled triangle through its acute an...

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  15. In a triangle ABC the maximum value of (a cos^(2)A//2 +b cos^(2)B//2+c...

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  16. The sides of a triangle inscribed in a given circle subtend angles alp...

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  17. Statement-1: If a, b, c are the sides of a triangle, then the minimum ...

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  18. Given an isosceles triangle, whose one angle is 120^(@) and radius of ...

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  19. Two medians drawn from the acute acute angles of a right-angled triang...

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  20. If incircle of radius 4 of a triangle ABC touches the sides BC, CA, AB...

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