In Delta ABC, (r1 r+r2 r3)/(bc)=...

In `Delta ABC, (r_1 r+r_2 r_3)/(bc)=`

A

`(ca-r_3 r_1)/r_2`

B

`(r_3 r+ r_1 r_2)/(ab)`

C

`r_3^2/(4R-r_1-r_2)`

D

abc

Text Solution

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The correct Answer is:

B

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DIPTI PUBLICATION ( AP EAMET)-PROPERTIES OF TRIANGLES -EXERCISE 1B

In Delta ABC, r1^2+r2^2+r3^2+r^2=
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In Delta ABC, (ab-r1 r2)/r3=
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In Delta ABC, (r1 r+r2 r3)/(bc)=
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In Delta ABC, r3+ (r1 r2)/(r1+r2)=
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In DeltaABC,sqrt[[(rr1)/(r2r3)])=
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In Delta ABC, (r3+r1)sqrt[[(rr2)/(r3r1)])=
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In DeltaABC,r1r2sqrt[[(4R-r1-r2)/(r1+r2)])
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In DeltaABC,(r2(r3+r1))/sqrt(r1 r2+r2 r3+r3r1)=
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In DeltaABC,(b-c)/r1+(c-a)/r2+(a-b)/r3=
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In DeltaABC,(r1-r)/a+(r2-r)/b=
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In DeltaABC,(r1-r)/a+(r2-r)/b+(r3-r)/c=
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In /\ABC prove that (r1)/(bc) + (r2)/(ca) + (r3)/(ab) = 1/r - 1/(2R).
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In DeltaABC,r r1 cot""A/2=
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In Delta ABC, r2 r3 tan""A/2=
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In Delta ABC, (r1+r2) tan""C/2=
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In Delta ABC(r3-r)cot""C/2=
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In DeltaABC,r(cot""B/2+cot""C/2)=
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In DeltaABC,r(cot""A/2+cot""B/2+cot""C/2)=
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In DeltaABC,r1cot""A/2+r2cot""B/2+r3cot""C/2=
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In DeltaABC,r(r1cot""A/2+r2cot""B/2+r3cot""C/2)=
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