Find the Reference Angle (11pi)/8

Math
Since the angle is in the third quadrant, subtract from .
Simplify the result.
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To write as a fraction with a common denominator, multiply by .
Combine fractions.
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Combine and .
Combine the numerators over the common denominator.
Simplify the numerator.
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Multiply by .
Subtract from .
Find the Reference Angle (11pi)/8

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