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In a triangle ABCk if 4 Rr "cos" (A)/(2)...

In a triangle `ABCk if 4 Rr "cos" (A)/(2)"cos"(B)/(2)"cos"(C)/(2)`

A

`(r_(2)+r_(3))"sec"^(2)(A)/(2)`

B

`r_(1)r_(2)r_(3)`

C

`Delta`

D

s

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-PROPERTIES OF TRIANGLES-PRACTICE SHEET (EXERCISE-III) (LEVEL-II) (Straight Objective Type Questions)
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  6. r("cot"(A)/(2)"cot"(B)/(2)"cot"(C)/(2))=

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

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

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