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 double asin( double x ) 
 double x; /* double value */ 
 
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| Synopsis | #include "math.h" 
 The asin function returns the value, in radians, of the arc sine, or sin-1 of x. 
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| Parameters | x must be in the range of [-1, 1]. 
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| Return Value | asin returns a value in the range of [-π/2, π/2], if x is in the specified range; otherwise, asin returns 0.0, and sets errno (the system error variable) to EDOM. 
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| See Also | |
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