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Pre-Calculus - How to use the addition formula for two angles of sine cos105
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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 find the sine of 105 degrees by decomposing it into known angles using the sum and difference formulas. The instructor demonstrates how to use the unit circle to determine the sine and cosine values of 60 and 45 degrees, and then simplifies the expression to find the final result.
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