Find the Exact Value cos((7pi)/4-(11pi)/6)

Find the Exact Value cos((7pi)/4-(11pi)/6)
To write as a fraction with a common denominator, multiply by .
To write as a fraction with a common denominator, multiply by .
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
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Combine.
Multiply by .
Combine.
Multiply by .
Combine the numerators over the common denominator.
Simplify the numerator.
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Multiply by .
Multiply by .
Subtract from .
Move the negative in front of the fraction.
Add full rotations of until the angle is between and .
Evaluate .
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
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