Practice Approximate Trig Values 1

puremath

New member
Approximate the given trigonometric values to within successive tenths. Then use a calculator to compute the values to the nearest hundredth.

cos 2 and sin 2
 

MarkFL

La Villa Strangiato
Math Helper
What method are you instructed to use for the approximations? I would be inclined to use truncations of the following series:

[MATH]\sin(x)=\sum_{k=0}^{\infty}\frac{(-1)^k}{(2k+1)!}x^{2k+1}[/MATH]
[MATH]\cos(x)=\sum_{k=0}^{\infty}\frac{(-1)^k}{(2k)!}x^{2k}[/MATH]
 

puremath

New member
What method are you instructed to use for the approximations? I would be inclined to use truncations of the following series:

[MATH]\sin(x)=\sum_{k=0}^{\infty}\frac{(-1)^k}{(2k+1)!}x^{2k+1}[/MATH]
[MATH]\cos(x)=\sum_{k=0}^{\infty}\frac{(-1)^k}{(2k)!}x^{2k}[/MATH]

1. Cohen did not enclose the arguments in parentheses.

2. There is a picture to be used with this question(s).

3. In terms of radians or degrees, I have to check the textbook again.
 

MarkFL

La Villa Strangiato
Math Helper
Why are you posting the same post over and over?
 

MarkFL

La Villa Strangiato
Math Helper
I don't need it multiple times. One time, and I've got it. :)
 

puremath

New member
I don't need it multiple times. One time, and I've got it. :)

I could not upload the given circle picture here. So, we will skip all Approximate Trig Values threads.
 

MarkFL

La Villa Strangiato
Math Helper
Sorry, the huge images were taking up too much server space, and I had to revert the maximum allowed settings back to the default. You could use something like Imgur to host the images, and then hotlink to them here.
 

puremath

New member
Sorry, the huge images were taking up too much server space, and I had to revert the maximum allowed settings back to the default. You could use something like Imgur to host the images, and then hotlink to them here.

I do not know anything about Imgur.
 

MarkFL

La Villa Strangiato
Math Helper
I help admin a general chat forum where lots of the members use smartphones and they seem to indicate it's pretty easy to use.
 

puremath

New member
I help admin a general chat forum where lots of the members use smartphones and they seem to indicate it's pretty easy to use.

Do you have a link?
 

MarkFL

La Villa Strangiato
Math Helper
I don't use it myself, as I have no need for it, but you should be able to google it, etc.
 

puremath

New member
I don't use it myself, as I have no need for it, but you should be able to google it, etc.

Let me see what I do. There are too many questions throughout the Cohen textbook where using a geometric figure is needed.
 
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