How to evaluate the half angle of sine when given a triangle

The video tutorial explains how to calculate the sine of theta divided by two, emphasizing the negative sign due to the double angle. It covers the simplification of cosine and fractions, leading to the final calculation and simplification of the expression.

What is the significance of the sign of Theta in the context of the double angle?

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How is the cosine of Theta defined in terms of adjacent and hypotenuse?

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What is the result of 1 minus 1/3, and how can it be expressed as a fraction?

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Explain the process of rewriting a fraction divided by a whole number.

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What does the negative square root of 1/3 represent in this context?

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