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Mark W.
Retired engineer, currently tutor math subjects (3 - 12)
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Trigonometry
TutorMe
Question:

If Cos(x) and Sin(x) are both positive, what quadrant is x in?

Mark W.
Answer:

Quadrant I

Pre-Algebra
TutorMe
Question:

(1/2) * (4/3) * (1/9) * (27/2) =

Mark W.
Answer:

1

Calculus
TutorMe
Question:

Is a continuous function always differentiable?

Mark W.
Answer:

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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