given

a = ?

No idea where to start I am guessing but that is probably wrong. Help.

Edit: also tried

Not sure if it's right though. Can someone verify please?

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- September 18th 2011, 03:07 PMfreestarFind the value of cot^-1 given arctan
given

a = ?

No idea where to start I am guessing but that is probably wrong. Help.

Edit: also tried

Not sure if it's right though. Can someone verify please? - September 18th 2011, 03:25 PMPlatoFind the value of cot^-1 given arctan