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In Delta ABC, if cos A cos B+ sin A sin ...

In `Delta ABC, if cos A cos B+ sin A sin B sin C=1`, then `a:b:c`=

A

`1 : 1 : sqrt2`

B

`1 : sqrt2 : 1`

C

`sqrt2 : 1 : 1`

D

`sqrt2 : sqrt2 : 1`

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A
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AAKASH SERIES-PROPERTIES OF TRIANGLES-LECTURE SHEET EXERCISE - I ( Straight Objective Type Questions )
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