MATH U101 · Drill · supports Modules 1–2
Unit-Circle Flashcards
sin and cos at every standard angle, in radians — the instant-recall foundation the polar-coordinates module leans on. 32 cards; a round takes about 10 minutes.
How to drill
Say the answer out loud before revealing — reading the answer is not recall. Tap the card (or press space) to reveal; be honest with "Again", missed cards come back until the deck is clean. Twice a week until a full round has zero "Again"s — then you're done, for good.
Card 1 of 32
Tap to reveal