For a step-by-step explanation about how to use trig to solve right triangle problems, read this terrific explanation from mathopenref.com. The examples in this explanation use feet instead of metres. If you find a great example in metres, please post it in the "Suggest a link" block on the right. Thanks!
Try printing the above worksheet and working out some real-life trig problems on your own. (Problems #2 and #3). The answers can be found at http://www.funmaths.com/worksheets/downloads/view.htm?ws0038_2.gif.