<p>I was reading over the 3rd math section and came to question 53 “what is the least posible value for p?”. p is the perod of what looks like the graph of the -cos(2x). It says the anser is pi when in fact pi is the corect perod so is this a typo or am i not geting some thing?</p>
<p>look at the top of one curve to the top of the other curve. It goes from zero to pi… as a result the period is pi</p>