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If cosx + cosy + cosz = 0 "and" sinx + s...

`If cosx + cosy + cosz = 0 "and" sinx + siny + sinz =0, "then show that"`
`cos (x-y) + cos(y - z) + cos(z - x) = - 3/2.`

Text Solution

Verified by Experts

The correct Answer is:
`= -1/2 -1/2 -1/2 = -3/2`
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