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In DeltaABC,4Rrcos""A/2cos""B/2cos""C/2=...

In `DeltaABC,4Rrcos""A/2cos""B/2cos""C/2=`

A

`(r_2+r_3)sec^2""A/2`

B

`r_1 r_2 r_3`

C

`Delta`

D

s

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The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-PROPERTIES OF TRIANGLES -EXERCISE 1B
  1. In a triangle ABC , (r1+r2)/(1+ cos C)=

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  2. In DeltaABC,r^3 cot^2""A/2.cot^2""B/2.cot^2""C/2=

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  3. In DeltaABC,4Rrcos""A/2cos""B/2cos""C/2=

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  4. In DeltaABC,r^2 cot""A/2.cot""B/2.cot""C/2=

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  5. In DeltaABC,acotA+bcotB+c cotC=

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  6. In DeltaABC,acotA+bcotB+c cotC=

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  7. In DeltaABC,cos^2""A/2+cos^2""B/2+cos^2""C/2=

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  8. In DeltaABC,sin^2""A/2+sin^2""B/2+sin^2""C/2=

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  9. The length of the sides of the extriangle of an equilateral triangle i...

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  10. The distance between orthocentre and circumcentre of an equilateral tr...

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  11. The distance between orthocentre and circumcentre of an equilateral tr...

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  12. If Delta ABC is an equilateral triangle , then the ratio of the area o...

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  13. The ratio of circum radii of a triangle to its pedal triangle is

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  14. IF Delta ABC, is an equilateral triangle, then ratio of the sides of t...

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  15. The distance of the orthocentre from the vertices A,B,C are in the rat...

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  16. In a triangle ABC let angle C=pi//2. If r is the inradius and R is the...

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  17. The perimeter of a triangle is 16 cm. One of the sides is of length 6 ...

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  18. In Delta ABC, if C=90^@ then r r3=

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  19. In Delta ABC, if C=90^@ then 2(r+R)=

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  20. In Delta Abc, if A=90^@ then r2+r3=

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