Question: Prove by induction that 0 n1 0 2n ( )=co(- tan cot 2r 2n 2r - cot 0. (*)

Prove by induction that 0 n1 0 2n ( )=co(- tan cot

Prove by induction that 0 n1 0 2n ( )=co(- tan cot 2r 2n 2r - cot 0. (*)

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