Sin 120 | How to Derive Sin 120 Degrees value? - BYJUS
Therefore, sin 120°= sin 60° From the trigonometry table, use the value of sin 60° which is equal to √3/2. Hence, the value of sin 120 degrees is √3/2. Method 2. By using the value of cosine function relations, we can easily find the value of sin 120 degrees. Using the trigonometry formula, sin (90 + a) = cos a, we can find the sin 120 ...