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How to Use the Unit Circle in Trigonometry

science.howstuffworks.com/math-concepts/unit-circle.htm

A unit circle is an important part of trigonometry and can define right angle relationships known as sine, cosine and tangent.

Who Wins (and Loses) If U.S. Imposes Steel Tariffs?

money.howstuffworks.com/who-wins-and-loses-if-us-imposes-steel-tariffs.htm

HowStuffWorks looks at President Donald Trump's proposal for tariffs on steel and aluminum and explores whether these could spark a global trade war.

How Juneteenth Became Black Independence Day

history.howstuffworks.com/american-history/juneteeth.htm

Though it's been around for more than 150 years, Juneteenth was still a mystery to many. But now, it's the newest federal holiday in the U.S.A.

How the Declaration of Independence Birthed the American Nation

history.howstuffworks.com/revolutionary-war/declaration-independence.htm

HowStuffWorks takes a look at the U.S. Declaration of Independence document - what's inside it and what's not.

10 Reasons the Multiverse Is a Real Possibility

science.howstuffworks.com/10-reasons-multiverse-is-real-possibility.htm

In 1957, Hugh Everett first wrote about the multiverse - different realms where every choice spawns a separate universe in which another version of ourselves does something different. It sounds crazy, but here are some reasons it might be true.

What does Alt+F4 do?

computer.howstuffworks.com/question266.htm

Someone suggested during an online computer game that someone press Alt and F4 at the same time. Another player said you better not. I've asked AOL people about this but have gotten no response. Can you tell me what would happen?

How do they create the special effects in movies like The Matrix where the camera rotates around a frozen actor?

entertainment.howstuffworks.com/question295.htm

In movies like "The Matrix" and "Lost in Space," and in some TV commercials, there is an effect where the action freezes and the camera "walks around" the frozen scene. How do they do that?

Texas: A Chopper Profile

auto.howstuffworks.com/texas-chopper-profile.htm

Texas chopper is a motorcycle with a 117-cubic-inch engine and a 6-speed gearbox. See photos and specifications of the Texas chopper.

How to Build a Backyard Bird Sanctuary

home.howstuffworks.com/how-to-build-a-backyard-bird-sanctuary.htm

You wish you knew how to build a backyard bird sanctuary, but don't know where to find information. Learn about how to build a backyard bird sanctuary in this article.

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