trignometry

• Nov 25th 2008, 04:42 AM
elephunk
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
• Nov 25th 2008, 07:52 AM
masters
Quote:

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:

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

If t = 4,

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

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

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

• Nov 25th 2008, 09:31 AM
elephunk
Okay, So for 3.0 on the first table it would be something like this?

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

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

Thanks
• Nov 25th 2008, 09:59 AM
masters
Quote:

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

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

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:

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

If t=24, then

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