Question

PLEASE HELP!!!

Find all solutions:

3cos[(pi/5)x]=2

Please help

Answer 1

I'm sorry I don't understand this :/ I will google it and assist you upon your search! :)

Answer 2

The answers apparently are:

0.1339+10k
and
8.6614+10k
where k is an integer.

The problem is, I don't know how to SOLVE to get the answers.
They give us a select few answers, but I still need to know the process of how to get there, if that makes sense.

Answer 3

Alright I think I know the answer to your problem... Maybe Try this

https://www.khanacademy.org/math/differential-calculus/limits_topic/algebraic-limits/v/limit-example-1

If this doesn't help I'll try to find more links to help you out :)

Answer 4

Try this one love I think it fits more along the lines of what we're doing here. :3

https://www.youtube.com/watch?v=tqXQKTTlRWE

Answer 5

Okay, I'll look at it and see if it's what I need. Thanks!

Answer 6

Welcome Sorry I'm not that great at explaining or helping I try!

Answer 7

\(cos(\frac{\pi x}{5})=3/2\\cos^{-1}(3/2)= \frac{\pi x}{5} +2k\pi\)

Answer 8

sorry,typo , all 3/2 should be 2/3