What angle corresponds to the point where the sine wave crosses zero on its way up?

The angle that corresponds to the point where the sine wave crosses zero on its way up is 0°. At 0°, the sine function takes the value of zero, which is the starting point of the sine wave's cycle. As the sine wave begins its ascent from this point, it moves towards its maximum value at 90°.

In the context of the sine wave, the function can be described as follows:

• At 0°, the sine value is 0, marking a crossing point.

• As the angle increases to 90°, the sine value reaches its peak.

• Meanwhile, at 180°, the sine wave crosses zero again, but this is on the downward path, not the upward path.

Understanding these key points reinforces the concept of the sine function and its periodic nature, showcasing how it behaves over a 360° cycle, with 0° being the point of initial zero crossing as it ascends.