#1:

Isolate cos(x):

Now I'm sure you've gone what values of x would work to solve the last line.

#2:

In that last line, I basically took the cosine of both sides. You would need a calculator for this as I doubt you know the exact value of .

Results 1 to 3 of 3

- August 14th 2008, 01:37 PM #1

- Joined
- Aug 2008
- Posts
- 2

## Please help

I am taking pre-cal at our local college and have my final on monday. The teacher gave us a study guide but I am having a few problems and need some help please. I am stuck on these two problems:

solve algebraically between [0,2pie]

2cosx +Sq. root2=0

other problem: solve for x

arccos x- arccot6/5=0

Can someone please show me how to work these. I am sure we went over it in class but I am lost. Thank you

- August 14th 2008, 01:51 PM #2

- August 14th 2008, 04:06 PM #3

- Joined
- Aug 2008
- Posts
- 2