Exploring the Relationship between Sine and Cosine Ratios

In this video, the relationship between sine and cosine ratios is explored by analyzing their respective graphs. The concept of complementary angles is introduced, showing that the sine and cosine of complementary angles are equal. The graphs of sine and cosine are compared, and it is observed that they coincide when shifted by 90 degrees, leading to the understanding that cosine is a cofunction of sine. This lesson provides a visual and conceptual understanding of the relationship between sine and cosine ratios.