I have three suggestions for you.
- First of all search the web for the term practical uses of trig.
- Go to the Math Beyond School section of Math Central and use the Search window to search for the term trig.
- Go to the Quandaries and Queries page of Math Central and use the Quick Search to search for the term math beyond school trig. This will bring you to mathematics questions we have received from the general public where our solution involves the use of trigonometry.