# (calc.info)Scientific Functions

10 Scientific Functions
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The functions described here perform trigonometric and other
transcendental calculations. They generally produce floating-point
answers correct to the full current precision. The `H' (Hyperbolic)
and `I' (Inverse) flag keys must be used to get some of these functions
from the keyboard.
One miscellanous command is shift-`P' (`calc-pi'), which pushes the
value of `pi' (at the current precision) onto the stack. With the
Hyperbolic flag, it pushes the value `e', the base of natural
logarithms. With the Inverse flag, it pushes Euler's constant `gamma'
(about 0.5772). With both Inverse and Hyperbolic, it pushes the
"golden ratio" `phi' (about 1.618). (At present, Euler's constant is
not available to unlimited precision; Calc knows only the first 100
digits.) In Symbolic mode, these commands push the actual variables
`pi', `e', `gamma', and `phi', respectively, instead of their values;
**Note:** Symbolic Mode.
The `Q' (`calc-sqrt') [`sqrt'] function is described elsewhere;
**Note:** Basic Arithmetic. With the Inverse flag [`sqr'], this command
computes the square of the argument.
**Note:** Prefix Arguments, for a discussion of the effect of numeric
prefix arguments on commands in this chapter which do not otherwise
interpret a prefix argument.

- Logarithmic Functions
- Trigonometric and Hyperbolic Functions
- Advanced Math Functions
- Branch Cuts
- Random Numbers
- Combinatorial Functions
- Probability Distribution Functions

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