Final answer to the problem
$-0.6360298$
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Step-by-step Solution
Specify the solving method
1
Calculating the tangent of $20$ degrees
$\frac{99}{272}-1$
2
Subtract the values $\frac{99}{272}$ and $-1$
$-0.6360298$
Final answer to the problem
$-0.6360298$