# What is Cycle

When a waveform reaches a complete set of positive and negative value it is called one cycle., such as if a sinusoidal wave, completes one set of positive and negative values, is called one cycle of sine wave cycle. One cycle is corresponding to the angular measure of 360 deg.

**Refer the Example sin wave:**

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Take the electrical quantity voltage or current in y-axis and time or angle in the x-axis. In this, a sin wave has the complete Positive half cycle from 0 deg to 180 deg and the complete negative half cycle from 180 deg. To 360 deg. Combination of Both positive and negative half cycle is called one complete cycle.

**Note:** A complete cycle may not have 360 deg of the waveform. But it should have one positive and negative half cycle.