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In a triangle ABC , (r1+r2)/(1+ cos C)=...

In a triangle ABC , `(r_1+r_2)/(1+ cos C)=`

A

`2ab//c Delta`

B

`(a+b)//c Delta`

C

`abc // 2 Delta`

D

`abc//Delta^2`

Text Solution

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The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-PROPERTIES OF TRIANGLES -EXERCISE 1B
  1. In DeltaABC,r(r1cot""A/2+r2cot""B/2+r3cot""C/2)=

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  2. In DeltaABC,(r1+r2)sec^2""C/2=

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  3. In a triangle ABC , (r1+r2)/(1+ cos C)=

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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