Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

I have to draw the plot of domain of the function z=(y+x)/cosx...so I have to draw the $x \neq k\pi +\pi/2$ graph..how do I do this? I tried replacing it by $\text{cos(x)} \neq 0$ but I dont know how to build this one either?

share|improve this question
    
$x\neq k\pi +\frac{\pi}{2}$ is no function, hence you have no graph, try to rephrase your question –  Dominic Michaelis Mar 12 '13 at 17:44

1 Answer 1

Your domain is comprised of infinitely-many pairwise-disjoint open strips. Draw the vertical lines $x=\pm\pi/2,$ $x=\pm3\pi/2,$ $x=\pm 5\pi/2$ (and so on) as dotted lines--at least, as many of these as will fit in the window of your graph--your domain will consist of every point in the plane that isn't on one of those dotted lines.

share|improve this answer
    
You are a genius.Thank you! –  Beyonce90 Mar 12 '13 at 17:52

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.