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If cotA/2=(b+c)/a ,then the DeltaABC,is...

If cot`A/2=(b+c)/a` ,then the `DeltaABC`,is

A

isosceles

B

equliteral

C

right angled

D

none of these

Text Solution

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The correct Answer is:
C
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OBJECTIVE RD SHARMA-PROPERTIES OF TRIANGLES AND CIRCLES CONNECTED WITH THEM-Exercise
  1. In a triangle ABC,vertex angles A,B,C and side BC are given .The area ...

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  2. The area of the circle and the area of a regular polygon of n sides an...

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  3. If cotA/2=(b+c)/a ,then the DeltaABC,is

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  4. In a DeltaABC ,tan(A/2)=5/6 ,tan(C/2)=2/5,then

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  5. In a triangle ABC , the line joining the circumcentre and incentre is ...

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  6. In a triangle ABC,r=

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  7. The ex-radii of a triangle r(1),r(2),r(3) are the hamonic progression ...

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  8. In any triangle A B C , prove that: a^3cos(B-C)+b^3cos(C-A)+c^3cos(A-B...

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  9. If c^2 = a^2 + b^2, 2s = a + b + c, then 4s(s-a) (s - b)(s-c)

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  10. The sides of a triangle are 13,14,15, then the radius of its in-circle...

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  11. If a cos A=b cos B , then the triangle ,is

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  12. The in-radius of the triangle whose sides are 3,5,6,is

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  13. In an equilaterial triangle of side 2sqrt3 cms, the circum-radius ,is

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  14. If the angles of a triangle are in the ratio 1:2:3,the corresponding s...

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  15. In any !ABC , (Sigma)((sin^(2)A+sinA+1)/(sinA)) is always greater tha...

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  16. In any !ABC , (Sigma)((sin^(2)A+sinA+1)/(sinA)) is always greater tha...

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  17. In a right angled !ABC sin^(2)A+sin^(2)B+sin^(2)C=

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  18. In any DeltaABC if 2 cosB=a/c ,then the triangle ,is

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  19. If in a DeltaABC ,a sin A=b sin B, then the triangle, is

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  20. In any !ABC ,If cot(A/2),cot(B/2),cot(C/2) are in A.P.,then a,b,c are...

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