please answer this...........
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in general...
cot^-1 x + cot^-1 y = cot^-1 (xy-1/x+y)
cot^-1 x + cot^-1 y = cot^-1 (xy-1/x+y)
Vineeta20:
wat nonsense...... upto how many terms i will use d formula
wt r d given options...?
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