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May16-10, 06:54 AM
HW Helper
P: 3,535
Maths and long-term memory

Oh yes, of course. Forgetting something like how to manipulate algebraic expressions isn't common, but something as abstract as - say - expanding cos(a+b) can easily be forgotten. Unless you're one of the lucky few that CAN remember these after many months without revision, then good on you.

Else... do what we all do and study up to refresh your memory before the exam