Proofs that just don't work!

anderson17 Posts: 3, Reputation: 1

New Member

May 4, 2010, 08:28 PM

proofs that just don't work!

1/1-sinx = sec^2x + 2secx(tanx-1)

ArcSine Posts: 969, Reputation: 106

Senior Member

May 5, 2010, 04:33 AM

Evaluate both sides at x = 0, and remember that a single counterexample disproves an identity.

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