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In Delta ABC , r1r2 sqrt([( 4R -r1-r2)...

In ` Delta ABC , r_1r_2 sqrt([( 4R -r_1-r_2)/( r_1+r_2)]) `=

A

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

B

` r_1r_2r_3`

C

` Delta `

D

` s `

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - II
  1. In Delta ABC , ( Delta ^(2))/( a^(2) + b^(2) + C^(2)) {(1)/( r1^(2) ...

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  2. In Delta ABC , ( r1r+ r2r3)/( bc)=

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  3. In Delta ABC , r1r2 sqrt([( 4R -r1-r2)/( r1+r2)]) =

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  4. Prove that sum (r+r1) tan ((B-C)/( 2))=0

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  5. In Delta ABC, the correct formule among the following are Statemen...

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  6. In Delta ABC , with usual notation observe the two statements given ...

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  7. In Delta ABC Macth of following

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  8. Assertion (A) : The angle between equal sides of an isosceles triangle...

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  9. Assertion (A) : In Delta ABC a,b, c denotes lengths of the sides an...

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  10. Statement -I : In Delta ABC , b cos ^(2) "" ( C)/(2) + c cos ^(2) ""...

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  11. In a Delta ABC , ir r1 = 2r2 = 3r3 " then " (a)/(b) + ( b)/( c ) + (...

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  12. If in a Delta ABC, r1= 2r2= 3r3, then the perimeter of the triangle ...

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  13. If in a Delta ABC , r1 =2r2=3r3, then b: c=

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  14. If cot ""(A)/(2) = 30 , Cot "" (B)/(2) = 50 , Cot "" ( C)/(2) = 70...

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  15. A tower, of x metres high, has a flagstaff at its top. The tower and t...

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  16. A ladder of 20 mt long reaches a point 20 mt below the top of a flag s...

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  17. The angle of elevation of the toop point P of the vertical tower PQ of...

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  18. A lamp post is sittuated at the middle point M of the side AC of a tri...

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  19. A flag staff stands vertically on a pillar. The height of the flag sta...

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  20. A tower subtends angles alpha, 2alpha, 3alpha at A,B and C all lyin...

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