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chapsticks
New Member

USA
1 Posts

Posted - 12/07/2011 :  11:09:55  Show Profile  Reply with Quote
Verify the identity:

arctanx+ arctan (1/x)=( ∏/2)

using calculus theory.

differentiate the left hand side of the identity.
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royhaas
Moderator

USA
3059 Posts

Posted - 12/08/2011 :  01:20:36  Show Profile  Reply with Quote
The hint should be that taking the derivative of both sides will show that the original left hand side must be constant. Use the chain rule to show this.
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