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Trig Identities: A Crash Course in Complex Math Concepts
science.howstuffworks.com/math-concepts/trig-identities.htm
Fundamental trigonometric identities, aka trig identities or trigo identities, are equations involving trigonometric functions that hold true for any value you substitute into their variables.
How Math Works
science.howstuffworks.com/math-concepts/math.htm
A world without math is unimaginable. It's a part of who we are. It's the analytical juice of our left brain. In the words of physicist Richard Feynman, even a fool can use it. So why do so many of us turn our backs on numbers?
10 Times Humanity Found the Answer (and Then Forgot)
history.howstuffworks.com/10-times-humanity-found-answer-and-then-forgot.htm
Could humanity be even farther ahead if we hadn't forgotten what we'd learned centuries ago? Learn about 10 times we forgot answers at HowStuffWorks.
How to Use Plaque-disclosing Tablets
health.howstuffworks.com/wellness/oral-care/products/how-to-use-plaque-disclosing-tablets.htm
Using plaque-disclosing tablets can help make sure plaque is removed completely during brushing and flossing. See how to use plaque-disclosing tablets.
What is the plug-in electric vehicle credit?
auto.howstuffworks.com/car-models/plug-in-hybrids/plug-in-electric-vehicle-credit.htm
What is the plug-in electric vehicle credit? Visit HowStuffWorks to learn what the plug-in electric vehicle credit is.
What Is Pi?
science.howstuffworks.com/math-concepts/pi.htm
Whether the circle is as big as planet Mars or as small as a tennis ball, the ratio of its circumference divided by its diameter will always equal pi (3.14). But why?
How Information Technology Works
money.howstuffworks.com/how-information-technology-works.htm
Information technology applies to a number of different careers and fields. Learn more about information technology at HowStuffWorks.
How NFL Quarterback Ratings Work
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NFL quarterback ratings are complicated. Visit HowStuffWorks to learn all about NFL quarterback ratings.
Professional Fluoride Treatment
health.howstuffworks.com/wellness/oral-care/procedures/professional-fluoride-treatment.htm
Professional fluoride treatments are quick and easy ways to protect your teeth. Learn all about professional fluoride treatments.
5 Food Animals That Are Smarter Than Your Pet
animals.howstuffworks.com/animal-facts/5-food-animals-that-are-smarter-than-your-pet.htm
Some food animals are smarter than your pet. Really. See this list of five food animals smarter than your pet to get a whole new take on bacon.