# Section I: Multiple Choice (1 Viewer)

#### photastic

##### Well-Known Member
for fuck sakes, i did not see that coming, that nails the bloody cover on the coffin, it must be 3...

i put 3 initially but then was like tanpi/2 is undefined, i freaking hate multiple choice now.
No, there is a chance at pi/2 there is an open circle, hence B would be the answer in this case.

#### chrisdelinet

##### Member
can you explain why that (sin(pi/2) -1)(tan(pi/2)+2) = 0, because i thought that undefined times zero is undefined and the calculator cannot figure it out.... i quite baffled tbh

#### chrisdelinet

##### Member
No, there is a chance at pi/2 there is an open circle, hence B would be the answer in this case.
so its B then?

#### photastic

##### Well-Known Member
can you explain why that (sin(pi/2) -1)(tan(pi/2)+2) = 0, because i thought that undefined times zero is undefined and the calculator cannot figure it out.... i quite baffled tbh
Hard to explain since I used 4u to graph it. I've seen these situations like absolute values where if you put the value in the calculator, it reads limited answers but when you graph the solution, there are actually more answers. But since this is 2u, they would most likely accept B since 2u is so limited.

so its B then?
Hope not

#### chrisdelinet

##### Member
for the sake of both us and people of similar mindset that they'll accept both, but that is most unlikely

#### Carrotsticks

##### Retired
The answer to that MC problem is (B), as x=pi/2 is not defined.

The sketch of the curve LOOKS like it has three X intercepts, but there is actually an open circle at x=pi/2.

#### Thank_You

##### Active Member
Lol screwed up that easy probability mcq gg