CPhill

The standard trig functions return an angle value, not an angle!!!!

The inverse functions return an angle.

I'm assuming you want to know how to convert an angle in decimal form to DMS form.

Let me show you.  Let's suppose that we have an angle with a measure of 23.438° and we want to convert it to DMS.

First, ignore the 23.  Now multiply .438 by 60 = 26.28. The whole number part is the number of minutes.

Again, ignore the whole number part and multiply .28 by 60 = 16.8. This is the number of seconds.

So 23.438° = 23° 26' 16.8" in DMS form.

Converting back is easy......use this "formula"

Degrees  + (Minutes / 60) + (Seconds / 3600)= 23 + (26/60) + (16.8/3600)  =

23.438°........which is just what we started with!!

Hope that helps......

This page has a wealth of information concerning the graphs of the trigonometric functions:

There is a "formula" for calculating the slope.

m = (y2 - y1) ' (x2 - x1)   where m is the slope.

Basically, it says to subtract the y values in some order and then subtract the x values in the same order.  Then, put the first result over the second to get the slope.

OK......let's subtact the y's in this order   ...    5 - (-1)  = 6

And now we'll subtract the x's in the same order  ....   -2 - 0  = -2

Now.....put the first thing over the second......    6/-2 = -3

And there's the slope. This says that everytime x chages by 1, y changes by -3. Look at the graph to verify this for yourself.

Let me emphasize one thing.....the order of subtraction must remain the same between the  y's and the x's, or else your answer will be incorrect. Note, if the line "falls" from left to right and we get a positive slope.......we've done something wrong!! The slope should be negative in this situation!!! This is always a good visual check to ensure that our answer makes sense.

Note Rose98, that J is located at (4,4). It has the same y coordinate that L does, and L is located on the y axis. So L must be located at (0,4). For a analogous reason, K's coordinates must be (4,0). So you can use the distance formula to find the distance between L and K.

However, we have a square here because JK =JL = 4 = the side length.

And the diagonal of a square is just the side length times √2.

So, 4*√2  = the diagonal length.    This is easier than using the distance formula, IMHO.

Does that help??

Let's first calculate the number of minutes in 15 hrs.  We have.....

15 * 60 = 900 minutes

So ......  (Total Pages) / (Total Minutes) = Pages Per Minute

(1200)/(900) = 12/9 = 4/3 = 1+1/3 pages per minute........

To check this, note that ...Total Minutes * Pages Per Minute = Total Pages .....thus....    900 * (4/3) = 3600/3 = 1200

I assume this might be :

360((29/19)^(1/720)-1) = 0.211490523648288

Just distribute the 7 across the two terms inside......this will give us....

7c - 14

And that's it !!!

Melody, I believe - but I'm not sure - that we can generate some Pythagorean Triple "Fractions", using the Pythagorean Triples themselves!!!......I just played around with this a second ago, so I don't really know if it's true - but it seems like it might be.

Let a and b be the first two numbers of any Pythagorean Triple.

Now square them, and write them as denominators of two fractions, each having a numerator of 1. So we have:

1/a² + 1/b²  =

(b² + a² ) / (a²* b²)  =

(b² + a² ) / (a * b)² 

Note that the numerator is a perfect square (the square of the last number in the triple, c) and the denominator is a perfect square, too!!

Therefore:

(1/a)² + (1/b)²  = (c/ab)²

And there's a "Pythagorean Triple" Fraction.....!!!!

Actually, rosala....I think I made it more "mysterious" than it really is!!!

Ater looking at this again, I don't know what buttons I pushed on the calculator, but it's definitely NOT some decimal between  0 and 1 !!!

I concur with Melody's answer.........587.1852583387229.......!!!!

(I can't believe I didn't catch such a blatant error!!)

I'm even taking a pair of my sunglasses away as a self-imposed punishment....!!!