👉 Cosecant, also known as the reciprocal of sine, is a trigonometric function that represents the y-coordinate of the point on a unit circle where the angle at which it makes an arc equals 90 degrees. It's denoted by "c" and is defined as: \[ \text{cosec}(\theta) = \frac{1}{\sin(\theta)} \] where $\theta$ is the angle in radians or degrees. This function is particularly useful