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The King property of integration - discussion and 3 examples!

One of the coolest properties in integration not mentioned in any textbook I own. Try these:

1) Integrate: $$\int_{0}^{\pi/2}\frac{sin^{n}x}{sin^{n}x+cos^{n}x}\ dx\text{, for any integer }n$$

2) Integrate: $$\int_{0}^{\pi/2}\frac{1}{1+(tanx)^{\pi}}\ dx$$

3) Integrate: $$\int_{0}^{1}\frac{ln(x+1)}{x^{2}+1}\ dx$$

Yes, you need the answers and discussion HERE.

The Ellipse-Hyperbola Connection: Graphing made easy!

Applying more than one integration technique to solve a single integral