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Atan()Category: Trigonometric Syntax: Atan ( number ) Parameters: number ”any expression that resolves to a numeric value. Description: The arc tangent of a number is the angle (measured in radians) whose tangent is the specified number. The range of values returned by the Atan function is -(pi/2) to pi/2. Examples: Atan (0) = 0 Atan (1) = .785398163 which is pi/4 radians, or 45 degrees. Comments: If Atan (x) = y , then Tan (y) = x . Atan (x) = Atan (-x). |
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