Popular California Cities. 1  Long Beach. 2  Los Angeles. 3  San Diego.  San 1  Francisco. San Jose.  Ventura.
The common schoolbook definition of the sine of an angle in a right triangle (which is equivalent to the definition just given) is as the ratio of the lengths of the side of the triangle opposite the angle and the hypotenuse, i.e., (1)
The sine function, along with cosine and tangent, is one of the three most common trigonometric functions. In any right triangle, the sine of an angle x is the length of the opposite side (O) divided by the length of the hypotenuse (H). In a formula, it is written as 'sin' without the 'e': Often remembered as SOH - meaning Sine is Opposite over Hypotenuse.