Let the line segment BD be x, then sin A = x/15
or, x = 15sinA
Also

The last option
The answer is 3, since 3*3*3 equals 27
A function has a vertical asymptote where it is not defined, and the logarithm is defined only if its argument is strictly positive: it has a vertical asymptote if its argument is zero, and is not defined if its argument is negative.
So, you have a vertical asymptote where
