i have not able to answer any of that at all , i feel that i will never pass the final year exam with all that stress on my head ...need please ,but only if u guys know any them .:D

Printable View

- May 24th 2007, 01:22 PMcarlasadersome more problems!!
i have not able to answer any of that at all , i feel that i will never pass the final year exam with all that stress on my head ...need please ,but only if u guys know any them .:D

- May 24th 2007, 01:41 PMecMathGeek
1. Find at if

Plugging in we get:

Do you need this explained more?

I'm not sure what method you need to use to solve number 2 of the first page. Are you expected to use Newton's method or something else? - May 24th 2007, 01:43 PMJhevon
- May 24th 2007, 02:05 PMecMathGeek
3. a) Prove that

Notice that , and are suplementary (they sum up to equal ), and that . Therefore, and are complementary. This means that and thus that .

With all of that said. Here's where I can start the proof:

Notice that , Therefore: and . However, . Therefore:

If we add these two equations, we get:

Now divide everything by 3 to get:

- May 24th 2007, 02:09 PMecMathGeek
- May 24th 2007, 02:35 PMecMathGeek
3. b) Express in the form and find the values of and to 2 decimal places.

Notice that but we want . So we want . Therefore, we need and .

To solve this will take some creativity.

We have:

Let's square both sides of each equation:

Now, we'll use the identity to get:

Setting the two equal, we get:

Using this, we can find :

- May 24th 2007, 02:42 PMecMathGeek
3. c) Find the value of .