<p>i need to solve:</p>
<p>cos(((2pi)/11)(x-3))=cos((2pi)/7)(x-2)</p>
<p>that is first graph has a B value of 2pi/11 and translated to the right by 3
and second graph has B value of 2pi/7 and translated to the right by 2</p>
<p>now heres the catch... i need the first four INTEGER values of X</p>
<p>i can plug this in the equation solever on the 89 or graph... but both ways i have no idea how to just get integer values let alone 4 of them.</p>
<p>thanks!</p>
<p>That's why you don't depend on the Ti-89.</p>
<p>Just inverse cosine both sides and solve for the first one. Then because of their respective periods of 11 and 7, you know they return to that value at intervals of 77. So I got, 1/4, 309/4, 617/4, 925/4. I know that 1/4 is the first one but I am unsure whether the other 3 are the first 3. If anyone can help me out here?</p>
<p>Graph the equation </p>
<p>Y = cos(((2pi)/11)(x-3)) - cos((2pi)/7)(x-2)</p>
<p>Then use the graph to find the first 4 values of x in which the graph is at y=0</p>
<p>i love you.</p>
<p>thats pretty smart.</p>
<p>that's ridiculously easy, what amazes me more is you are in ap physics from another post. this is simple math all you need to know is the period of a sin and cosine graph.</p>
<p>ouch personal attack..</p>
<p>you must be a cool kid to flame people you dont know.</p>
<p>i was thinking more along the lines of using an operator or mod and the piping function of the 89 to solve the problem instead... having never really used an 83 im not used to abusing the graphing feature for all of this....</p>
<p>and not only am i in AP Physics, but i am damn good at it too(one of the best in my state in fact)</p>
<p>How would you know that you're the best in your state at AP Physics since every class is different for each school and district. And what state is that in which you could make such a claim? I can't think of any small enough where you could possibly know that and I'm from South Dakota. Population of 740,000.</p>
<p>Yea, really man that is an easy problem. Not to be an @$$ it just is. Don't counter his remark like that, if you can't do that problem and need to call on a "math god" then your state must not be the best at physics. Just because I'm capable of an 800 on an SAT math test, and I placed second at a WYSE math competition I will NEVER go anywhere close to saying that I'm one of the best in state. I'm good, but that's a ridiculous claim. I'd suggest giving proof man.</p>