Answer:
Tan(x) = 1/
We know that Tan 30 = 1/
Therefore, x = 30 degrees
A fraction is just a short way to WRITE a division problem. It means "the top number divided by the bottom number". Take the two numbers from the fraction, DO the division, and you get the decimal.
The transformation is a reflection in the line

followed by a reflection in the line

.
The mapping for a reflection in the line

is

.
That is simply swapping the coordinates.
Now we reflect the resulting coordinates in the line

which has the mapping
So we transform the resulting coordinates as follows:
Hence we have