I am stuck on these 2 problems and was wondering if someone could work them out for me?

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- Nov 24th 2010, 01:23 PMwonderdhelp with inverse trigonometric functions
I am stuck on these 2 problems and was wondering if someone could work them out for me?

http://i232.photobucket.com/albums/e...Untitled-1.png - Nov 24th 2010, 02:48 PMskeeter
what have you tried ?

- Nov 24th 2010, 02:56 PMPlato
- Nov 24th 2010, 03:20 PMwonderd
this is a brilliant tool thank you very much! But i do have one problem. For this problem sin(arccos 2/5 - arctan5) - Wolfram|Alpha I need exact form and it gives it ot me in decimal. What can I do?

- Nov 24th 2010, 04:30 PMskeeter
- Nov 24th 2010, 04:41 PMwonderd
would someone be willing to work it out for me?

- Nov 24th 2010, 06:33 PMProve It
What does $\displaystyle \displaystyle \tan{45^{\circ}}$ equal? What is the inverse cosine of that?