Learn the basic **trigonometry ratios** in trigonometry chapter. As beginners one should learn these trigonometry ratios. A ratio of trigonometry plays a vital role in learning trigonometry chapter. Without knowing these ratios we can’t do any problem in trigonometry.

**What is a trigonometry?**

Trigonometry is a branch of mathematics, where we are going to study about the relationship between sides and angles of right angled triangle.

**Trigonometry ratios table:**

Let

** **Δ ABC be a right angled triangle. The side AB is opposite side to θ. The side BC is adjacent side to θ**. **AC is the hypotenuse in triangle ABC.

sin | |

cos | |

tan | |

cosec | |

sec | |

cot |

**Example on trigonometry ratios:**

In a Δ ABC, AB = 3 cm and BC = 4 cm then find the values of all six trigonometric ratios.

Solution:

Given

In a Δ ABC,

AB = 3 cm and BC = 4 cm,

Then AC = 5 cm. (According to Pythagoras theorem).

sin

cos

tan

cosec

sec

cot

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