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If cot^(-1)x+cot^(-1)y + cot^(-1) z = pi...

If `cot^(-1)x+cot^(-1)y + cot^(-1) z = pi/2` , then `x +y+z` is also equal to a)`1/x+1/y+1/z` b)xyz c)`xy+yz+zx` d)None of these

A

`1/x+1/y+1/z`

B

xyz

C

`xy+yz+zx`

D

None of these

Text Solution

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The correct Answer is:
B
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