A) \[\frac{x-y}{1+xy}\]
B) \[\frac{x+y}{1-xy}\]
C) \[\frac{x-y}{x+y}\]
D) \[\frac{1-xy}{1+xy}\]
Correct Answer: B
Solution :
[b] Put \[x=\tan \theta \] and \[y=\tan \phi \]You need to login to perform this action.
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