COSH()

All functions > MATH > COSH()

Returns the hyperbolic cosine of a number.

Signatures

Hyperbolic cosine

Returns: Hyperbolic cosine, always ≥ 1

COSH(number: T) → DOUBLE

With:

• T : Floating-point type (FLOAT, DOUBLE)

Signature notes:

• Definition: COSH(x) = (e^x + e^(-x)) / 2
• Always returns values ≥ 1
• Even function: COSH(-x) = COSH(x)
• Returns NULL if the input is NULL

Examples

SELECT
    -- cosh(0) = 1
    f1 := COSH(0e0),
    -- cosh(1)
    f2 := COSH(1e0),
    -- Even function
    f3 := COSH(-1e0),
    -- cosh(2)
    f4 := COSH(2e0)
;