1. ## trignometry

Hi,

I have my calculator in radians. I just need to know what to put in. I tried doing this but values I was getting didn't seem right.

Any help with this would be greatly appreciated.

Thanks

2. Originally Posted by elephunk
Hi,

I have my calculator in radians. I just need to know what to put in. I tried doing this but values I was getting didn't seem right.

http://i45.photobucket.com/albums/f9...lles/table.jpg

Any help with this would be greatly appreciated.

Thanks
I checked the values already listed in the table and they were correct. Here is one of them:

$y=5-3\sin\left(\frac{\pi t}{6}+\frac{\pi}{4}\right)$

If t = 4,

$y=5-3\sin\left(\frac{4\pi }{6}+\frac{\pi}{4}\right)=4.22354265\approx 4.22$

Be sure you entered correctly in your calculator. Here is the sequence for the one I just did.

$5 - 3 sin((4 \pi / 6 + (\pi / 4))$

3. Okay, So for 3.0 on the first table it would be something like this?

$5 - 3 sin((4 \pi / 6 + (\pi / 4))$

Do I do the same thing for the second table? The value for 24.0 is 2.88 which is totally different.

Thanks

4. Originally Posted by elephunk
Okay, So for 3.0 on the first table it would be something like this?

$5 - 3 sin(({\color{red}3} \pi / 6 + (\pi / 4))$

Do I do the same thing for the second table? The value for 24.0 is 2.88 which is totally different.

Thanks
You replace t with 3. When you do you get:

$5 - 3 sin(({\color{red}3} \pi / 6 + (\pi / 4))=2.88$

If t=24, then

$5 - 3 sin(({\color{red}24} \pi / 6 + (\pi / 4))=2.88$

(t, y)= (0, 288), (1, 2.10), (2, 2.10), (3, 2.88), (4, 4.22), (5, 5.78), (6, 7.12), (7, 7.90), (8, 7.90), (9, 7.12), (10, 5.78), (12, 2.88), (14, 2.10), (16, 4.22), (18, 7.12), (24, 2.88)

5. Thanks I was working it out correctly then

Just needed to check.

Thanks again