Determine your quadrant when given constaints on sine and cosine

The video tutorial explores the concept of quadrants in geometry, focusing on the unit circle and the relationship between cosine, sine, and tangent. It explains how these trigonometric functions relate to the X and Y coordinates on the unit circle, particularly when the radius is 1. The tutorial further analyzes the signs of these functions in different quadrants, emphasizing when sine and cosine are negative, and concludes that under certain conditions, the relevant quadrant is Quadrant 3.

Describe the conditions under which the cosine function is negative.

What quadrant is determined when both sine and cosine are negative?