I solved this question but I am unable to find the direction? Please help, tell me the method on how to solve.

A woman walks eastward for 5 km and then north-ward for 10 km. How far is she from her starting point? If she had walked directly to her destination, in what direction would she have headed?

I solved the question and I got R = 11.18km

but I am unable to get the direction. Someone explain it.

My guess is,

R Sin x = 10

11 Sin x = 10

Sin x = 10/11

Is that correct?