Explain the process of using the half angle formula for cosine.
Using the half angle formula for cosine to evaluate for an angle cos
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Mathematics
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11th Grade - University
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Hard
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The video tutorial explains how to calculate the cosine of 112 degrees and 30 minutes by doubling the angle to 225 degrees and using the half-angle formula. The process involves simplifying the expression to find the final cosine value, considering the angle's position in the second quadrant where cosine is negative.
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OPEN ENDED QUESTION
3 mins • 1 pt
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
What is the final answer when evaluating the cosine of 225 degrees?
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