Include '#include

On Linux type 'man

sin of x with x in radians | sin(x) |

cosine of x with x in radians | cos(x) |

tangent of x with x in radians | tan(x) |

arctangent of x, returning 2 quadrant value in radians | atan(x) |

arctangent of y/x, returning 4 quadrant value in radians | atan2(y,x) |

e to the power x | exp(x) |

natural log of x | log(x) |

base 10 log of x | log10(x) |

hyperbolic sin of x | sinh(x) |

hyperbolic cosine of x | cosh(x) |

square root of x | sqrt(x) |

x to the power y | pow(x,y) |

absolute value of x | fabs(x) |