Sum of Squares of Hyperbolic Secant and Tangent/Also presented as
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Sum of Squares of Hyperbolic Secant and Tangent: Also known as
Sum of Squares of Hyperbolic Secant and Tangent can also be reported as:
- $1 - \tanh^2 x = \sech^2 x$
or:
- $1 - \sech^2 x = \tanh^2 x$
Sources
- 1981: Murray R. Spiegel: Theory and Problems of Complex Variables (SI ed.) ... (previous) ... (next): $2$: Functions, Limits and Continuity: The Elementary Functions: $5$
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): hyperbolic function