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Browse Classroom Capsules and Notes

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An alternative criterion to determine if a number is irrational

Using geometry to find the derivatives of inverse trigonometric functions

Find the real interest.

The author uses geometry to clarify Simpson Paradox.

Non-commutative and non-associative examples

A new way to look at the base change formula

A modification of the definition of the area bounded by possibly negative polar functions is presented.
The Mean Value Theorem is used to prove divergence of certain slowly divergent series.

A geometric explanation of the reflective property of an ellipse

Using integration by part to find the error in numerical integration.