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If in a Delta the ex-reddii r(1) r(2) ...

If in a `Delta ` the ex-reddii `r_(1) r_(2) r_(3)` are in the ratio 1:2:3 then their sides are in the ratio :-

A

`5:8:9`

B

`1:2:3`

C

`3:5:7`

D

`1:5:9`

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The correct Answer is:
A
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ALLEN-Solutions of Triangle & Binomial Theorem-EXERCISE-I
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  2. If c^2=a^2+b^2,2s = a+b+c , then 4 Delta ^2=

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  4. In Delta ABC, (a + b+ c) (b + c -a) = kbc if

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  5. In Delta ABC if (a+b+c) ( a-b+c)= 3ac, Then find angle B

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  6. The perimeter of atriangle ABC is 6 times the arihmetic mean of the si...

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  7. If in A B C ,A C is double of A B , then the value of cot(A/2).cot((B...

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  8. In Delta ABC a =5 ,b=3 ,c=7 .Then value of 3 cos C +7 cos B is equal :...

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  9. In triangle ABC, of r(1)= 2r(2)=3r(3) Then a:b is equal :-

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  10. In any Delta ABC , cot(A/2),cot(B/2),cot(C/2) are in A.P., then

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  11. In Delta ABC of a :b:c= 7 : 8: 9 .Then cos A : cos B is equal to :-

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  12. The ratio of the area of a regular polygon of n sides inscribed in a c...

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  13. In Delta ABC angle A = (pi)/(6) & b:c= 2: sqrt(3) "then " angle B is

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  14. In a triangle ABC a= 4 , b= 3 , angle A =60 ^@ ,Then c is root of equ...

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  15. In a right - angled isosceles triangle , the ratio of the circumradius...

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  16. The exradii of a triangle r(1),r(2),r(3) are in HP , then the sides a,...

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  17. Given b=2 , c= sqrt(3), angle A= 30^@ then inradius of Delta ABC is :-

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  18. In a triagnle ABC, angle B=pi/3 " and " angle C = pi/4 let D divide ...

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  19. If sin theta and - cos theta are the roots of the equation ax^2-bx-...

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