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If cot^2x=cot(x-y)(x-z),t h e ncot2x is ...

If `cot^2x=cot(x-y)(x-z),t h e ncot2x` is equal to `(w h e r ex!=pi/4)` . `1/2(tany+tanz)` (b) `1/2(coty+cotz)` `1/2(siny+sinz)` (d) none of these

A

`1/2 ( tan y + tan z)`

B

`1/2 ( cot y + cot z)`

C

`1/2 (sin y + sin z)`

D

None of these

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The correct Answer is:
B
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