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Home Q & A Board Science-Related Homework Help Mathematics Calculus
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slimes slimes
wrote...
Posts: 162
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3 years ago
Find the equation of the normal line to f(x)=sinx+cosx at x = π.
My answer was y= x + (-1-π) would that be correct?
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12 Replies

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wrote...
#1
Educator
3 years ago
I got something a little different, could you check my work?
slimes Author
wrote...
#2
3 years ago
I did, but here's what I did exactly so not really so sure.
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wrote...
#3
Educator
3 years ago
I rechecked my answer, and I'm confident I found the equation of the normal. As for yours:

Quote
My answer was y= x + (-1-π) would that be correct?

It's not the same as mine. You must have inputted something wrong.
slimes Author
wrote...
#4
3 years ago
I don't think so I got the same coordinates and everything just for the final answer you got -1 + π = b but I think it's supposed to be -1-π=b, giving me y= x + (-1 - π)
wrote...
#5
Educator
3 years ago
Which is what I provided earlier
slimes Author
wrote...
#6
3 years ago
Quote from: bio_man (3 years ago)
Which is what I provided earlier
So my answer was right?
wrote...
#7
Educator
3 years ago
Hi slimes,

I provided a complete answer under my first reply.

Then you showed me your work, and I responded:

Quote from: bio_man (3 years ago)
I rechecked my answer, and I'm confident I found the equation of the normal. As for yours ... It's not the same as mine. You must have inputted something wrong.

Either you take my solution, or you use yours, right? Not sure what you're confused about...
slimes Author
wrote...
#8
3 years ago
Hi bio_man! you said my solution was wrong so I was confused as to how you go the final answer. I got the same coordinates and all, but for the part of -1 + π = b, isn't the sign supposed to be subtraction not addition? My work is shown above (green attachment)
wrote...
#9
Educator
3 years ago Edited: 3 years ago, bio_man
Quote from: slimes (3 years ago)
Hi bio_man! you said my solution was wrong so I was confused as to how you go the final answer.



Which part of my solution do you disagree with? I'm getting the sense that you know the answer, but are not telling me. Are my Spidey senses correct?
slimes Author
wrote...
#10
3 years ago
No I would have told you, not sure if I missed something in my solution but it was for this part: (attachment)
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#11
Educator
3 years ago
Why would you make pi negative, you're moving it over to the left side of the equation, which changes it symbol.
slimes Author
wrote...
#12
3 years ago
Yes because I didn't know you had to put the negative 1 beside the pi, in my solution it was positive that's why. I was following through y= x + b, and for the coordinates (pi, -1) the -1 is the y value.
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