Translations:Documentation/Calc Functions/SEC/20/en

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Formula Description Returns
=SEC(PI()/4) secant or inverse cosine of PI/4 or π/4 radians 1.4142135623731
=SEC(1) secant or inverse cosine of 1 radian 1.85081571768093
=SEC(RADIANS(60)) secant of 60° by first converting angle in degrees to radians 2
=SEC(PI()/2) secant of PI/2 or π/2 radians #NUM!