Learn how to evaluate the half angle for sine in radians

The video tutorial explains how to find the sine of an angle not on the unit circle using the sum and difference formula. It starts by discussing the unit circle and the angle 5π/8, then introduces the sum and difference formula. The tutorial guides viewers through determining the value of U in the formula and simplifying the trigonometric expression. The final section covers the calculation steps and concludes with the solution.

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