I can't for the life of me remember how to do these

lim t->0 of (t^(3))/[tan(2t)]^(3)

lim t->0 of [sqrt(1+tan(t)) - sqrt(1+sin(t))]/(t^(3))

These 2 also =(

evaluate dy if y=x^(3) - 2x^(2) + 1 if x=2 and dx= 0.2 I don't see why you would need dx? Wouldn't you just differentiate x and then plug in the 2? hmm...

And this last one

approximate sqrt(64.05) using differentials.

THANKS IN ADVANCE!!!!