Maths by Mr. M. P. Keshari

Trigonometry Ratio of Complementary Angles

Let us consider a triangle ABC right angled at B. Let

**Example 6.** Without using trigonometirc tables, evaluate:

**Solution:- **

= -6

Maths by Mr. M. P. Keshari

Subjects |
Maths (Part-1) by Mr. M. P. Keshari |

Chapter 9 |
Circle |

Chapter 10 |
Tangents to a circle |

Chapter 11 |
Geometrical Construction |

Chapter 12 |
Troigonometry |

Chapter 13 |
Height and Distance |

Chapter 14 |
Mensuration |

Chapter 15 |
Statistics |

Chapter 16 |
Probability |

Chapter 17 |
Co-ordinate Geometry |