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If A+B =pi/3 and cosA+cosB=1, then which...

If A+B =`pi/3` and cosA+cosB=1, then which of the following is/are true

A

`cos(a-b)=1/3`

B

`abs(cosA-cosB)=sqrt(2/3)`

C

`cos(A-B)=-1/3`

D

`abs(cosA-cosB)=1/(2sqrt3`

Text Solution

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The correct Answer is:
B, C
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