Trigonometric functions: |

cos(x) | - Cosine function. |

sin(x) | - Sine function. |

tg(x) | - Tangent function. |

ctg(x) | - Cotangent function. |

acos(x) | - Arc cosine function. |

asin(x) | - Arc sine function. |

atg(x) | - Arc tangent function. |

actg(x) | - Arc cotangent function. |

Engineering functions: |

exp(x) | - Function of exhibitor. look: exp(x) = e^{x}, e - Euler number: e^{x} ≈ 2,7182818284590452353602874713527… |

sqrt(x) | - Function of square root. look: sqrt(25) = √25 = 25^{1/2} = 5 ^{2}√90^{4} = 90^{2/4} = 90^{1/2} = 30 |

log(x) | - Function natural logarithm. look: log(x) = log_{e}(x); log_{e}(2)=0.301… |

abs(x) | - Function, module (absolute) number. look: abs(-50) = |-50|=50 |

round(x) | - Function of rounding to the nearest whole number to the discretion. look: round(30.3) = 30; round(30.7) = 31; round(30.5) = 31 |

floor(x) | - Function of rounding to the nearest whole number down. look: floor(10.9) = 10; floor(10.3) = 10 |

ceil(x) | - Function of rounding to the nearest whole number up upwards. look: ceil(10.9) = 11; ceil(10.3) = 11 |