



 
Hi Jenny. Everywhere! You can type trigonometry into the search form on our Math Beyond School section and you'll find some articles that describe other places for trig. Besides those, if you type in sine or cosine into our Quandaries and Queries search, then you'll find many problems people have sent to us where we used trigonometry to solve them. Some examples are:
There are dozens more in our archive as well. In Geology, the angles that earth's plates meet each other affects the likelihood of earthquakes. Trigonometry is essential for this. In chemistry, the atoms in a molecule bond at particular angles and crystallize in particular forms (this is why, for example, snowflakes always have six sides). Trigonometry figures out the molecular forms and helps predict the effects up at our scale. In astronomy, trigonometry is used for calculating where in the sky particular stars are and how they are moving relative to us. Precise calculations help us to find earthlike planets around other stars that might be home to other forms of life. In navigation, GPS, radar, and even sky navigation, trigonometry is the mathematical foundation for calculating one's position. And there is music. I could continue this list, but it really is endless, Jenny. Stephen La Rocque.  


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