Screenshot by Lightshot <----

I have been doing math for 6 hours straight and my brain is fried. These are the last questions due on my hw and I don't understand. Please help!!!

Any kind of insight would help.

Thanks so much!!

Hey nhoward.

In terms of Q5,Q6,Q7 you need to find the values which the inequalities have in common.

We know that sin(x) is > 0 when x is in [0,pi] and < 0 when x is in (pi,2pi). cos(x) is > 0 when x is [0,pi) and (3*pi/2,2pi]

With regards to trigonometric functions do you have to find a value for theta or is it something else? The reason I ask is because they give values for r which implies that you need to use that to find something.

Originally Posted by nhoward
Screenshot by Lightshot <----

I have been doing math for 6 hours straight and my brain is fried. These are the last questions due on my hw and I don't understand. Please help!!!

Any kind of insight would help.

Thanks so much!!
Have you made any attempt at all? We are not a homework service, you are only supposed to post two questions per thread, and you are supposed to show some effort - i.e. show what you have tried and exactly where you are stuck.