Find the Exact Value (tan(pi/18)+tan(pi/9))/(1-tan(pi/18)tan(pi/9))

Math
Simplify the numerator.
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Evaluate .
Evaluate .
Add and .
Simplify the denominator.
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Evaluate .
Multiply by .
Evaluate .
Multiply by .
Subtract from .
Divide by .
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
Find the Exact Value (tan(pi/18)+tan(pi/9))/(1-tan(pi/18)tan(pi/9))

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