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The sides of a triangle are in AP. If th...

The sides of a triangle are in AP. If the angles A and C are the greatest and smallest angle respectively, then `4 (1- cos A) (1-cos C)` is equal to

A

`cos A -cos C `

B

`cos A cos C`

C

`cos A + cos C`

D

`cos C - cos A `

Text Solution

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The correct Answer is:
C
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