How to use the difference of two angles to evaluate for the sine of an angle

The video tutorial explains how to calculate the sine of 15 degrees, initially using a calculator and rounding the result. It then transitions to finding the exact value using the difference formula for sine, breaking down the process into steps. The instructor emphasizes the importance of understanding the unit circle for evaluating trigonometric functions and presents different mathematical representations of the result. The tutorial aims to equip students with the skills to find both approximate and exact values of trigonometric functions.

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