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Hyperbolic Trigonometry Identity Proof: 1-tanh^2(x) = sech^2(x)
In this video I go over a very quick hyperbolic trig identity proof of the identity 1-tanh^2(x) = sech^2(x) using the hyperbola identity, cosh^2(x) - sinh^2(x) = 1, which I proved in my earlier video.

Download the notes in my video: https://www.dropbox.com/s/0aef0y5jj9gen4p/434%20-%20Hyperbolic%20Identity%20-%201%20-%20tanh2%28x%29%20%3D%20sech2%28x%29.pdf

Related Videos:

Hyperbolic Trigonometry Identity Proof: cosh^2(x) - sinh^2(x) = 1: http://youtu.be/-UXUqIWRNEA
Hyperbolic Trigonometry Identity Proof: sinh(-x) = -sinh(x), cosh(-x) = cosh(x): http://youtu.be/-Wqq4Wzi7O8
Hyperbola - Definition and derivation of the equation: x^2/a^2 - y^2/b^2 = 1: http://youtu.be/Y6iYC4VEAi0
Hyperbolic Functions - tanh(x), sinh(x), cosh(x) - Introduction: http://youtu.be/EmJKuQBEdlc .

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