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If a: b: c = 2 : sqrt 6 : ( sqrt3+ 1 ) ...

If a: b: c = 2 : ` sqrt 6 : ( sqrt3+ 1 ) " then " angle C =`

A

`45 ^(@) `

B

` 60 ^(@) `

C

` 75 ^(@) `

D

` 90 ^(@) `

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The correct Answer is:
C
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - II
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  12. If the sides of trinangles are x^(2) + x+ 1,2 x + 1 , x^(-2) -1 wher...

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  13. The sides of a triangle are sin alpha,cos alpha and sqrt(1+sin alpha c...

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  14. In Delta ABC if b+c:c+a:a+b=11:12:13, then cos A: cos B: cos C=

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  15. The smallest angle of the triangle whose sides are 6+sqrt12,sqrt48,sqr...

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  16. In DeltaABC, " if" (1)/(a+c)+(1)/(b+c)=(3)/(a+b+c) then show that C=...

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  17. If DeltaABC, ifangleC=(pi)/(3), "then"(3)/(a+b+c)-(1)/(a+c) equals

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  19. If angles A,B,C are in A.P . , then 2cos (( A-C)/( 2))=

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