need a "basic" help this may be a silly question... but, i really need this, because a basic is the stairway to the advanced of course. i thought that this forum may provide more help than i could get in my college. please tell me... how do we find an answer of "sin(theta)" without an electronic device (such as calculator or computer). Can we do it manually, mathematically? i thought that a calculator never needs a calculator's calculator to get the number. So i think there must be a way. thanks b4.