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Let A and B denote the statements A: c...

Let A and B denote the statements
`A: cos alpha + cos beta + cos gamma = 0`
`B:sin alpha+sin beta + sin gamma = 0`
If `cos(beta-gamma)+cos(gamma-alpha)+cos (alpha-beta)= -3//2`
Then

A

both A and B are true

B

both A and B are false

C

A is true B is false

D

A is false B is true.

Text Solution

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The correct Answer is:
a
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