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If c^2=a^2+b^2,2s = a+b+c , then 4 Delta...

If `c^2=a^2+b^2,2s = a+b+c ,` then `4 Delta ^2`=

A

`S^4`

B

`b^2c^2`

C

`c^2a^2`

D

`a^2b^2`

Text Solution

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The correct Answer is:
D
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ALLEN-Solutions of Triangle & Binomial Theorem-EXERCISE-I
  1. In a Delta ABC b= sqrt(3)+1, c=sqrt(3)-1 , angle A = 60 ^@ then the v...

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  2. In any Delta ABC the value of 1-tan""B/2 tan""C/2 is equal to :-

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  3. If c^2=a^2+b^2,2s = a+b+c , then 4 Delta ^2=

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  4. If in a Delta the ex-reddii (r(1) r(2) r(3) are in the ratio 1:2:3 t...

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  5. If in a triangle (r(2)- r(1))(r(3)-r(1))=2r(3)r(3) then the triangle i...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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