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Prove that r+ r3 + r1 -r2= 4 R cos ...

Prove that
` r+ r_3 + r_1 -r_2= 4 R cos B `

A

`4R cos A `

B

` 4R cos B `

C

` 4 R cos C `

D

` 4R `

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - 1
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  2. In Delta ABC, if a,b,c are in A.P, then r1,r2,r3 are in

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  3. Prove that r+ r3 + r1 -r2= 4 R cos B

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  16. In Delta ABC, if sin C=(sin A)/(2 cos B) then the triangle is

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  17. The angle of elevation of the sun when length of the shadow of a pole ...

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