Tutor profile: Mark W.
If Cos(x) and Sin(x) are both positive, what quadrant is x in?
(1/2) * (4/3) * (1/9) * (27/2) =
Is a continuous function always differentiable?
No...we can say if if f(x) is differentiable at x it is continuous at x, but a continuous function need not always be differentiable.
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