these two questions are confusing for me i dont know where to get started.

1.if n inscribed rectangles were used, what would the expression be, in sigma (http://s0.wp.com/latex.php?latex=%5C...&fg=333333&s=0) notation, that approximates the exact area? How is the value of this approximation related to the exact area of n approaches infinity?

2. Integrate the following:

a. http://upload.wikimedia.org/wikipedi...0dede3f1e8.png(4 cos5x)dx

almost done this course!

Re: these two questions are confusing for me i dont know where to get started.

Quote:

Originally Posted by

**alisunderani** 1.if n inscribed rectangles were used, what would the expression be, in sigma (

http://s0.wp.com/latex.php?latex=%5C...&fg=333333&s=0) notation, that approximates the exact area? How is the value of this approximation related to the exact area of n approaches infinity?

This question seems to be taken out of context. Inscribed into what? It would help to post the complete question, including the information leading to it.

Quote:

Originally Posted by

**alisunderani**

Have you tried differentiating sin(5x)?