Probability is a branch of mathematics that deals with the occurrence of a random event. The probability formula is defined as the possibility of... View Article
sin 10 + sin 20 + sin 40 + sin 50 = (sin 10 + sin 50) + (sin 20 + sin 40) = (2 sin 30 cos 20) + (2 sin 30 cos 10) = 2 sin 30 (cos 10 + cos 20) =... View Article
