Write an expression as a single trig function of an angle using sum and difference form

The video tutorial explains how to solve a trigonometric problem by identifying and applying the sine difference formula. The instructor begins by introducing the problem and its similarity to another example. They guide the students through identifying the correct formula by eliminating other trigonometric identities. The application of the sine difference formula is demonstrated, and the problem is solved by calculating the sine of the difference between two angles. The tutorial concludes with a summary of the steps involved in the process.

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