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
| 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 |