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If D id the mid-point of the side BC of a triangle ABC and AD is perpendicular to AC , then

A

`a^2+b^2+c^2=4b^2`

B

`a^2+b^2-c^2=4b^2`

C

`a^2-b^2+c^2=4b^2`

D

`a^2-b^2-c^2=4b^2`

Text Solution

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The correct Answer is:
B
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ML KHANNA-PROPERTIES OF TRIANGLES -Problem Set (2)(MULTIPLE CHOICE QUESTIONS)
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  11. In any DeltaABC, prove that (a-b)^(2)cos^(2)""C/2+(a+b)^(2)sin^(2)""C/...

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  12. If cos A+cos B+2cos C=2 then the sides of the A B C are in A.P. (b) G...

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  14. If in a triangle ABC, 2 (cos A)/(a)+(cos B)/(b)+2(cos C)/c=(a)/(bc)+b/...

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

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  16. In a triangle ABC, 2ac sin((A-B+C)/2) =

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  17. In a A B C , prove that: (b^2-c^2)cotA+(c^2-a^2)cot B+(a^2-b^2)cotC=0

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