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In DeltaABC , if a =4 , b = 5, c= 60 ...

In ` DeltaABC , if a =4 , b = 5, c= 60 ^(@) , ` then C =

A

` 2 sqrt3`

B

` sqrt(21) `

C

` 8`

D

` 14`

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The correct Answer is:
B
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AAKASH SERIES-PROPERTIES OF TRIANGLES-PRACTICE EXERCISE
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  18. (c- b cos A )/( b - c cos A ) =

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  19. ( b+c) cos A + ( c+a) cos B +( a+b) cos C =

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