त्रिकोणमिति के सभी सूत्र – All Trigonometry Formula For Railway Exam

Trigonometry Formula (α+в)²= α²+2αв+в² (α+в)²= (α-в)²+4αв (α-в)²= α²-2αв+в² (α-в)²= (α+в)²-4αв α² + в²= (α+в)² – 2αв. α² + в²= (α-в)² + 2αв. α²-в² =(α + в)(α – в) 2(α² + в²) = (α+ в)² + (α – в)² 4αв = (α + в)² -(α-в)² αв ={(α+в)/2}²-{(α-в)/2}² (α + в + ¢)² = α² + в² … Read more त्रिकोणमिति के सभी सूत्र – All Trigonometry Formula For Railway Exam