Can anyone explain why formulae for sum and difference of inverse trignometric function changes with change in condition like tan^-1x +tan^-1y =tan^-1 (x+y)/(1-xy) where x0, y0 ,xy 0, y0,xy1

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Can anyone explain why formulae for sum and difference of inverse trignometric function changes with change in condition like tan^-1x +tan^-1y =tan^-1 (x+y)/(1-xy) where x>0, y>0 ,xy 0, y>0,xy>1

Saurabh Koranglekar · Answer

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Can anyone explain why formulae for sum and difference of inverse trignometric function changes with change in condition like tan^-1x +tan^-1y =tan^-1 (x+y)/(1-xy) where x>0, y>0 ,xy 0, y>0,xy>1

Can anyone explain why formulae for sum and difference of inverse trignometric function changes with change in condition like tan^-1x +tan^-1y =tan^-1 (x+y)/(1-xy) where x>0, y>0 ,xy 0, y>0,xy>1

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