Question

cos pi/2= sin @dumbcow @Psymon help please!!

Answer 1

= sinx?

Answer 2

i guess thats what needs to be found.

Answer 3

Well, we can assume that there's an x you missed or that wasn't written in the question, lol.

Answer 4

alright

Answer 5

So what is cos pi/2?

Answer 6

0

Answer 7

Alright. So when is sinx equal to 0?

Answer 8

pi?

Answer 9

And 0.

Answer 10

alright

Answer 11

Thats all there is to it, lol.

Answer 12

so the answer is either pi or 0?

Answer 13

Well, its both.

Answer 14

ohhh okay. so what if we had sin pi/2=cosx?

Answer 15

when does cos=pi/2 right?

Answer 16

Well if it were the other way around, we would need to say that sin pi/2 = 1 and then find where cosx = 1

Answer 17

okay so then what?

Answer 18

Well, where does cosx = 1. That would be all youd need to find

Answer 19

2pi?

Answer 20

i think the answer is sin(k*pi*x) where k is any integer including 0.

Answer 21

@Psymon so the answer is 2pi or what @Euler271 said?

Answer 22

2pi=1 tho...

Answer 23

Well, cos x = 1 at 0

Answer 24

answer is actually sin(k*pi) not sin(k*pi*x)

Answer 25

well my answer choices are these

3pi/2

none of these

2pi

pi/2

pi

Answer 26

Oh, he's looking at the original question. Yeah, cos pi/2 = sinx means x = 0 + kpi

Answer 27

So answer is pi then for you, lol.

Answer 28

for the second problem or the first one?

Answer 29

For the first.

Answer 30

He was looking at your original problem, I was just confirming what he said, lol.

Answer 31

okay so what about the second problem?

Answer 32

You were trying to find when cosx = 1, which is only at 0.

Answer 33

so its pi for both?

Answer 34

No, its 0 for the 2nd one.

Answer 35

it's sin(2pi) and sin(pi) in those options.

but the real answer is sin(kpi)

Answer 36

zero isnt a option so i put none of these?

Answer 37

Well, cosx = 1 only at 0. Technically, itd be 0 +2kpi. So if 2pi is an option then put that.

Answer 38

2pi is a option @psymon but is that the right answer