asin(x): Trigonometric Arcsine¶
Trigonometric arcsine function.
Declaration¶
Sintaxe¶
retval = asin(x)
elemental real(p) function asin(x)
elemental complex(p) function asin(x)
Argumentos¶
x the input value, can be real or complex; less than or equal to 1.
Valores de retorno¶
The returned value has the kind of the input value and TYPE may be real or complex.
Descrição¶
asin(x) computes the arcsine of the argument x.
The arcsine is the inverse function of the sine function. It is commonly used in trigonometry to find the angle when the lengths of the hypotenuse and the opposite side of a right triangle are known.
Tipos¶
Supported argument types float, double, complex float, complex double.
interface asin
module procedure sasin, dasin, casin, zasin
end interface
contains
interface
elemental real(sp) function sasin(x)
real(sp), intent(in) :: x
end function
elemental real(dp) function dasin(x)
real(dp), intent(in) :: x
end function
elemental complex(sp) function casin(x)
complex(sp), intent(in) :: x
end function
elemental complex(dp) function zasin(x)
complex(dp), intent(in) :: x
end function
end interface
Exemplos¶
program intrinsics_asin
implicit none
integer, parameter :: arg_x = kind(0.0)
real(arg_x) :: x1
real :: retval_x
real :: arg_x
retval_x = asin(0.84147098)
print *, ret_val_x
retval_x = asin(x1)
print *, ret_val_x
end program
Resultado:
0.99999
0.99999