Intimidated by trigonometry? A few minutes with Selraybob and that will all go away. Sel and his friends take all that twisted-up mathematical gobbledygook that the physics folks sling and make it simple. You might find yourself calling your old math teachers and giving them the growly-voiced what’s what. “Hey!” you might say. “Sine’s just a ratio!” But be nice. They’re still math folks. Free on Kindle.
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Disclaimer: The price of Across the Trig Divide: The Book of Right Triangles was accurate when this post was published on March 24th, 2021. However, Amazon can and does change Kindle book prices frequently and without notice. Always look closely at the price of an ebook on Amazon before clicking that yellow button. If you purchased a Kindle book by accident, it's simple to return, just follow the return instructions here.