some useful math functions for linux calculator bc

usage

Put bcrc somewhere such as ~/.bcrc, then start bc as follows:

# you may add an alias to your bashrc file:
#   alias bc='bc ~/.bcrc -l -q'
bc ~/.bcrc -l

supported functions

trigonometric functions

sin(x), cos(x), tan(x), cot(x), sec(x), csc(x)

inverse trigonometric functions

arcsin(x), arccos(x), arctan(x), arccot(x), arcsec(x), arccsc(x)

or asin(x), acos(x), atan(x), acot(x), asec(x), acsc(x)

logarithmic function

log(a, b)
ln(x)            # log(e, x)
lg(x), log10(x)  # log(10, x)
log2(x)          # log(2, x)

others

e(x), exp(x)     # exponentiation of e
pow(a, b)        # a ^ b
sqrt(x)          # x ^ 1/2
cbrt(x)          # x ^ 1/3
abs(x)           # absolute value of x
fac(n)           # factorial of n
c(n, k)          # n choose k, unordered
a(n, k)          # n choose k, ordered
deg(rad)         # Radians to degrees
rad(deg)         # Degrees to radians