The expression sin(3x) cannot be factored. Factoring is the process of finding what to multiply together to get an expression. Rather than being an expression, sine is a trigonometric function of an angle of a right-angled triangle that represents the ratio of the length of the opposite side to the length of the hypotenuse, the longest side of the angle. To solve y = sin(3x), make an equation for the integer. Then you can solve the equation for the variable x, and interpret the results.
- Form an equation with an integer
The zeros of y = sin(x) are multiples of pi (π). Therefore: 3x = nπ, where n represents an integer. This represents a multiple of pi.
- Solve the equation
Solve the equation for x by dividing nπ by three so the equation reads: x = (nπ)/3).
- Interpret the results
The equation x = (nπ)/3 means that the function equals zero at all multiples of π/3, such as π/3, (2π)/3, π, (4π)/3 and so on in both positive and negative directions.