ELI5: Explain Like I'm 5

Aryabhata's sine table

Okay, imagine you're playing with Legos and you want to build a tower that's a specific height. But you don't know how tall the tower needs to be. So you start building and measuring until you get it right. That's kind of like what Aryabhata did with sine tables!

Aryabhata was a really smart person who lived a long time ago in India. He wanted to figure out how to measure angles and distances in a really accurate way. And one way to do that is by using something called "sine."

Sine might sound like a type of spice, but it's actually a way of measuring how high up or how far across something is. Imagine you're playing a game of tag and you want to run as far away from the person who's "it" as possible. You might run straight ahead, but you might also run to the side to make it harder for the person to catch you. Sine helps us measure how far to the side you're running.

Now imagine you're trying to measure how far up a mountain you are. You could use a ruler, but that's not very accurate. Instead, you can use something called the "sine table." A sine table is like a really big chart that shows you the different angles and their corresponding sine values. So if you know the angle of the mountain you're climbing, you can look it up on the chart and see how high up you are.

Aryabhata was the first person to create a sine table! He did a lot of math and measurements to figure out all the different angles and their corresponding sin values. It was a lot of work, but it made it easier for people to measure things accurately. And even today, people still use sine tables to help them measure things like the height of mountains or the angle of a roof.
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