How can you assess a website for currency? a. by checking the the sites that appear at the top of the search because they're always the most current
b. by finding out how much it costs by looking at the page with pricing
c. by checking the page for dates showing when it was posted and when it was last revised
d. by looking at the “About” page to see who authored the page

6. write a user-defined matlab function for the following math function: r() = 4cos(4sin ) the input to the function is  (in radians) and the output is r. write the function such that  can be a vector. a) use the function to calculate r(/6) and r(5/6). b) use the function to plot (polar plot) r() for 0 ≤  ≤ 2. hint: use “ polar” and/or for “polar plot in matlab." include the title “'r(\theta)=4cos(4sin(\theta))”