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IF ABC is the triangle then one root of ...

IF ABC is the triangle then one root of `x^2-2bx cos A+b^2-a^2=0` is

A

a

B

b

C

C

D

none

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The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-PROPERTIES OF TRIANGLES -EXERCISE 1A
  1. In Delta ABC, if (sin A+sin B+sin C) (sin A+ sin B- sin C)=3 sin A sin...

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  2. In Delta ABC, if sin A+sin B+sin C=1+sqrt2 and cos A+cos B+cos C=sqrt2...

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  3. IF ABC is the triangle then one root of x^2-2bx cos A+b^2-a^2=0 is

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  4. In Delta ABC sum(sin^2A+sinA+1)/(sinA) is always greater than

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  5. In DeltaABCprod((sin^2A+sinA+1)/(sinA)) is always greater than

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  6. If A, B,C are angles of a acute angled triangle then the least value o...

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  7. In a right angled Delta ABC, sin^2 A+ sin^2 B+sin^2 C=

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  8. IF twice the square of the radius of a circle is equal to half the sum...

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  9. In a triangle ABC,if a is the arithemetic mean and b,c (b ne c)are the...

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  10. Points D,E are taken on the side BC of a triangle ABC, such that BD=DE...

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  11. In Delta ABC, if B=60^@,C=45^@ and D divides BC internally in the rati...

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  12. If the area of an isosceles triangle is sqrt2+1are vertical angle is 4...

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  13. IF A,B,C are angles of a triangle, then the minimum value of tan^2""A/...

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  14. In Delta ABC, sum a (sin B-sin C)=

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  15. In Delta ABC, sum a^2 (cos^2 B-cos^2 C)=

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  16. In Delta ABC, sum a .sin (B-C)=

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  17. In a triangle ABC, C=90^@. Then (a^2-b^2)/(a^2+b^2)=

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  18. In any Delta ABC,((a+b+c)(b+c-a)(c+a-b)(a+b-c))/(4b^2c^2)=

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  19. In Delta ABC, sum a^3 sin (B-C)=

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  20. In Delta ABC, sum a^3 sin (B-C)=

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