TANH

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Returns the hyperbolic tangent of a number.

Syntax

TANH(number: T) → DOUBLE

Type Parameters:

• T: Any numeric type (TINYINT, SMALLINT, INTEGER, BIGINT, FLOAT, DOUBLE, DECIMAL)

Arguments

Returns

DOUBLE - Hyperbolic tangent result (between -1 and 1)

Notes

• Definition: TANH(x) = SINH(x) / COSH(x) = (e^x - e^(-x)) / (e^x + e^(-x))
• Returns values in the range (-1, 1)
• TANH(0) = 0
• Odd function: TANH(-x) = -TANH(x)
• Approaches 1 as x approaches infinity
• Approaches -1 as x approaches negative infinity
• S-shaped (sigmoid) function
• Returns NULL if input is NULL

Examples