Posted by **Chiara** on Tuesday, April 19, 2011 at 4:02pm.

For trigonometric substitution to solve the above integral, fill in the blanks below using the picture of the triangle given.

integral (x^3)/(sqrt(25+9x^2)) dx

/ l

/ l

/ l

/ l

/ l

/ l

/ l

/ l

/ l side A

/ l

/ l

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side B

*** sorry hard to draw on the computer

side a=3x

side b=?

side c=?

3x/5=?

(3/5) dx=?

(sqrt(25+9x^2))/(5)=?

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