Yeah im again stuck at a question:

(b) Determine the exact value of the

x-coordinate of P, the point where

the graph intersects the x-axis

I have figured out the eq of function is: y = 2Sin(3x)-1 0<x<120

Any ideas? Thanks

**1**

# More Help

Started by Ron90, Jan 21 2008 07:37 PM

4 replies to this topic

### #1

Posted 21 January 2008 - 07:37 PM

### #2

Posted 21 January 2008 - 07:55 PM

Are you sure you have the correct equation there...I'm getting 2 answers

**=-=-=Marcus=-=-=**### #4

Posted 21 January 2008 - 08:06 PM

hmmmm, I got both 50 and 10, is there something in the question that ruled out 10?, and I think you ruled out the one >120 too early, make sure you don't ignore answers that are out of range until the very end, they may end up coming back into range

**=-=-=Marcus=-=-=**### #5

Posted 21 January 2008 - 08:32 PM

hmmmm, I got both 50 and 10, is there something in the question that ruled out 10?, and I think you ruled out the one >120 too early, make sure you don't ignore answers that are out of range until the very end, they may end up coming back into range

Ok what you have is right, the graph shows it hits 0 twice before 60 and so that P points to the second one so that makes sense. Thanks!

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