# Search Tips

**Search for an Exact Phrase**

You may search for an exact phrase by enclosing your query in quotes (e.g. "chapter 2").

**Exclude a Word**

To exclude a term from your search results, enter a minus sign before the word (e.g. apollo -greek -god).

**Force Inclusion of all Words**

Common words like "what" or "it" may sometimes be ignored by RefSeek. To force the inclusion of a term in your query, wrap it in quotes (e.g. lewis "and" clark).

**Either/Or Queries**

You may search for two or more queries simultaneously without forcing the inclusion of both in the results by entering OR in caps between each query (e.g. high school calculus OR geometry).

## Calculations

Enter a numeric query into the search field to find instant answers to math expressions or a range of unit conversions (e.g. 10 pints in liters, how many inches in a foot). An overview of supported math functions follows.

**Basic Math Operators**

Operator |
Function |
Example |

+ | addition | 64 + 32 |

- | subtraction | 28 - 7 |

* | multiplication | 10 * 100 |

/ | division | 27 / 3 |

^ | exponentiation (raise to a power of) | 10 ^ 2 |

sin, cos, tan | sine, cosine, tangent | tan 45 |

sqrt | square root | sqrt(49) |

log | logarithm base 10 | log(1024) |

**Unit Conversions**

Category |
Example |

Data | how many bits in a byte? |

Energy | 50 joules in BTU |

Length | 5 meters in feet |

Speed | 50 mph in knots |

Temperature | 0 celsius in fahrenheit |

Time | 1 year in days |

Volume | how many pints are in a liter? |

Weight | 10 ounces in grams |

If you haven't found what you were looking for, please send us an email. We're happy to help!