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In a triangle ABC if (cos A)/a=(cos B)/b...

In a triangle ABC if `(cos A)/a=(cos B)/b= (cos C)/c`, then `Delta ABC` is

A

Right-angled

B

Isosceles right-angled

C

Equilatercal

D

Scalene

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The correct Answer is:
C
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AAKASH SERIES-PROPERTIES OF TRIANGLES-PRACTICE SHEET (EXERCISE-I) (LEVEL-I) (Straight- Objective Type Questions)
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  12. (a ) /( b^(2) - c^(2)) + ( c )/( b^(2) - a^(2)) = 0 then B =

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  13. If 7,4 sqrt(3), sqrt(13), are the sides of DeltaABC then least angle i...

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  14. In DeltaABC, c (a cosB-b cosA)=

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  15. If the angles of the DeltaABC are in A.P., then a^(2)+c^(2)-ac=

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  16. If a = 26, b = 30 , cos C = ( 63 )/( 65) then C=

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  17. Show that (cosA)/(a)+(cosB)/(b)+(cosC)/(c)=(a^(2)+b^(2)+c^(2))/(2abc)

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  19. In Delta ABC , if c^(4) - 2 (a^(2) + b^(2) ) c^(2) + a^(4) +a^(2)...

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  20. If the angles A,B,C of a triangle are in A.P and sides a,b,c are in G....

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