Often times, mathematics is
not meaningful to students without talking about it in the context
of some sort of "real world" situation. While this is
not a "lesson" in the true sense of the word, I provide
links to pages that can be used as resources throughout the teaching
of a trigonometry unit - not just at the end of it.
Here are some links to pages with information on the uses of trigonometry.
Using Trigonometry to Calculate Distances in Our Galaxy
Surveying the Uses of Trigonometry
Measuring the Circumference of the Earth
NOTE: In my search for trigonometry in the real world, I came across dozens of job postings that required the use of trigonometry!