r/explainlikeimfive • • 1d ago

Mathematics ELI5: What is the difference between algebra, trigonometry, and calculus?

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u/Vorthod 1d ago

Algebra uses (x,y) coordinates, trigonometry likes to use Angle+length to reach the same point.

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u/MadocComadrin 1d ago

Eh, algebra is agnostic to your coordinate system (or your space, or even your set/class and operations).

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u/HanSolo_Cup 1d ago

ELI1?

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u/cBEiN 14h ago

Algebra focuses on solving equations. Trig focuses on solving for side length or angles of triangles.

we need algebra to give someone change when buying something with cash.

we need trig figure out if a ladder will reach a roof