Sohcahtoa*

Maddy was needing help with her maths homework tonight, this question in particular. For me it meant delving back into the dark arts known as trigonometry...

I have a headache now. Solving it wasn't too bad but explaining concisely to MAddy how to solve it without doing it for her wasn't easy. I'm glad I don't have to teach maths.

Cyber pint to the first person to work out the correct answer (one decimal place will do).

* Just in case any proper mathematicians are reading I know that, this being an acute triangle rather than a right angled triangle, sohcahtoa doesn't really have anything to do with it but it was the best trig related title I could manage.