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In DeltaABC,(b-c)/(b+c)cot""A/2+(b+c)/(b...

In `DeltaABC,(b-c)/(b+c)cot""A/2+(b+c)/(b-c) tan""A/2=`

A

` 2 cosec (B-C) `

B

` cosec (B-C) `

C

` cosec ((B-C)/( 2))`

D

` cosec ((B+C)/(2))`

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - II
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  7. If sin theta = a/(b+c) then show that cos theta = (2sqrt(bc))/(b+c) co...

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  8. If a= ( b-c) sec theta " then " tan theta =

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  11. In a triangle ABC, if cot""A/2 cot""B/2=c, cot""B/2 cot""C/2=a and cot...

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  15. 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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