abs
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The abs function returns the absolute value of its parameter
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acos
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Returns the arccosine of cosine in the range 0 to M_PI/2 radians
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asin
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Returns the arcsine of sine in the range -M_PI/2 to M_PI/2 radians
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atan
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Returns the arctangent of tangent in the range of -M_PI/2 to M_PI/2 radians
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ceil
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Returns a number representing the smallest value that is greater than or equal to n
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cos
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Returns the cosine of the specified angle
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exp
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Returns the exponential value of the parameter, if successful
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fabs
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Returns the absolute value of its argument
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floor
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Returns a number representing the largest value that is less than or equal to n
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fmod
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Returns the remainder (floating-point) of x / y
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labs
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Returns the absolute value of its argument
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ldexp
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Computes a real number from the mantissa and exponent
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log
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Returns the natural logarithm of n if successful
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log10
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Returns the base-10 logarithm of n if successful
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number_format
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Format number with decimals decimals, dec_point instead of a dot before the decimals and thousands_sep instead of a comma (",") between every group of thousands
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pow
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The pow function computes x raised to the power of y
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rand
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Returns a pseudorandom number
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round
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Get the rounded value of val to specified precision (number of digits after the decimal point)
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sin
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Returns the sine of the specified angle
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sqrt
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The sqrt function returns the square-root of x
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srand
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The srand function sets the starting point for generating a series of pseudorandom integers
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tan
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Calculate the tangent of the specified angle
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