Trigonometric ratios_Sum and Difference

In this video, we will explore how to find the values of trigonometric ratios without using a calculator by expressing them as the sum or difference of the values of these functions at known angles. We will delve into the sum and difference identities for sine, cosine, and tangent, enabling you to calculate trigonometric ratios for various angles accurately. By the end of this tutorial, you will have a solid understanding of how to utilize these identities to determine trigonometric values efficiently.