Trigonometric Ratios of Multiple and Substitute Angles
Trigonometric Ratios of Multiple and Substitute Angles 1. Sin2A = 2sinA cosA 2. Cos2A = cos²A – sin²A 3. Cos2A = 2cos²A – 1 (or) 1 + cos2A = cos²A 4. Cos2A = 1 – 2sin²A (or) 1 – cos2A = 2cos²A 5. 6. 7. The above relation are true for all values of angle Read more about Trigonometric Ratios of Multiple and Substitute Angles[…]