Casio FX-890P - Page 121

121
pow()
PURPOSE: Returns x to the power of y.
FORMAT: double pow(x, y) double x,y;
PARAMETERS:
1. x is a double precision floating-point number.
2. y is the power.
EXPLANATION:
1. pow(x,y) is essentially computed using the method x
y
= exp(y * log(x)). This
means that any negative x may generate a mathematical error, despite the
fact that x
y
is mathematically valid. Example: (-8)
1/3
generates an error.
SEE: log(), log10()
sin()
PURPOSE: Returns the value of sine (parameter).
FORMAT: double sin(x) double x;
PARAMETERS: x must be within the ]-1440°, +1440°[ or [-8π, 8π Radians ] range.
EXPLANATION:
1. The unit of the parameter x is specified using the angle() function.
2. The returned value is in the [-1, 1] range.
SEE: angle(), asin()
sinh()
PURPOSE: Returns the value of hyperbolic sine (parameter).
FORMAT: double sinh(x) double x;
PARAMETERS: x must be within the [-230.2585092, +230.2585092] range.
EXPLANATION:
1. The mathematical formula for hyperbolic sine is :
sinh(x) = (e
x
- e
-x
) / 2 where e is 2.7182818284590452353602874713526...
2. The returned value is in the ]-5x10
99
, 5x10
99
[ range.
SEE: acosh(), log()
sqrt()
PURPOSE: Returns the square root of the parameter.
FORMAT: double sqrt(x) double x;
PARAMETERS: x must be positive.
SEE: pow()