Without Using a Calculator, Give the Exact Trigonometric Function Value $17 \sqrt { 6 }$

Multiple Choice

Without using a calculator, give the exact trigonometric function value with rational denominator.
-Find the exact value of x in the figure.

A) $17 \sqrt { 6 }$
B) $17 \sqrt { 3 }$
C) $18 \sqrt { 3 }$
D) $15 \sqrt { 3 }$