i did this in high school and i remember understanding it.. but now i'm really rusty and a bit confused:
in this particular problem set, i am given a graph, and below it, and i am asked to find the area of the shaded region
i know the formula for area just fine, with the integral and all of that..but i'm confused as to how/why one knows that, for this particular graph, (or equal to), like, how do you know that those are the endpoints when they are not given? our solutions manual just... says that they are there.
any help is appreciated, thank you!
so.. is that something that one has to memorize? like, where do they get the range of ? and, yes, it does look like they are doing that, because in the manual it says 2 x the integral.. and then the final answer involves just the integral from 0 to positive
honestly.. i would review if i could, but i don't have any of my high school notes, and i really find the textbook that my instructor uses to be very difficult to understand. i guess i'm looking for some basic guidelines to polar graphs, because i'm lost as of right now. so, is it fair to say that one uses pi when dealing with cosine, and pi/2 when dealing with sine? does this have anything to do with the period of the wave? i'm sorry that these are such naive questions, but, i have no one else to go to, at this point.
i'm trying my best to understand, but, even without using symmetry, i'm not sure how to get the endpoints for the integrals..
like, another example, is i have a "4 petaled rose" graph of
and only the first petal is shaded.. but, i'm unsure of what i should use as the endpoints for that integral