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Is this Calculus Integral as Difficult as it Seems?

The Area of an Ellipse Formula: Three Different Ways!

Verifying Trig. Identities for Trigonometry and PreCalculus Students

The Integral of 1 dx. ∫1dx

Weierstrass Substitution and Examples

An integral with a surprising product rule -- check it out!

Integral Time!

Another Telescoping Series!

Showing Two Complex Vectors are Eigenvectors of a Matrix A

The Polar Distance Formula

A Telescoping Series with Inverse Tangent!

An Inverse Tangent Identity Gem!

Simplifying an Inverse Trig Expression

A Quick Integral 2

A Quick Integral 1

Linear Algebra Puzzle 2

Linear Algebra Puzzle 1

More Trigonometry?!

A Sneaky Integral!

Trigonometry Puzzle 2

Trigonometry Puzzle 1

Three Different Ways to Compute the Integral of Secant of x. ∫ sec(x) dx

A Peek Behind the Trigonometry Curtain!

Another Trigonometry Gem!