How to evaluate the half angle using the sine function

The video tutorial explains how to find the sine of π/8 using the half angle formula. It begins by introducing the problem and the half angle formula, then proceeds to solve for U by equating it to π/4. The cosine of π/4 is evaluated using the unit circle, and the expression is simplified to find the final solution for the sine of π/8.

What does the half angle formula state about the sine of U/2?

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How do you find the value of U when given that U/2 equals π/8?

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What is the cosine of π/4, and how is it derived from the unit circle?

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Explain the process of simplifying the expression involving radical 2/2.

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What is the final answer for the half angle of sine of π/8?

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