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IF alpha , beta and gamma are angl...

IF ` alpha , beta and gamma ` are angles such that ` tan alpha + tan beta + tan gamma = tan alpha tan beta tan gamma and x= cos alpha + i sin alpha , y = cos beta + i sin beta ` and `z= cos gamma + i sin gamma `, then xyz =

A

1, but not -1

B

`-1 ` but not 1

C

`+1` or -1

D

`0`

Text Solution

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The correct Answer is:
B
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