Luigi0210
How would I start this? Tangent line problem.



This Question is Closed


myininaya
Best Response
You've already chosen the best response.
1
You to find when f'=0

Luigi0210
Best Response
You've already chosen the best response.
3
Oh, alright, seems simple enough, thanks!

myininaya
Best Response
You've already chosen the best response.
1
Did you ever find f'?

Luigi0210
Best Response
You've already chosen the best response.
3
It would be
\[\LARGE f'(x)=2cosx+2sinxcosx\]
right?

myininaya
Best Response
You've already chosen the best response.
1
right now set that =0 and solve for x

myininaya
Best Response
You've already chosen the best response.
1
\[2\cos(x)(1+\sin(x))=0\]

myininaya
Best Response
You've already chosen the best response.
1
Solve both equations:
cos(x)=0
1+sin(x)=0

Luigi0210
Best Response
You've already chosen the best response.
3
And that'll give me x, to plug in and find y right?

myininaya
Best Response
You've already chosen the best response.
1
yep once you get x here
make sure you plug into f(x) to get the corresponding y for each x in that domain given.

Luigi0210
Best Response
You've already chosen the best response.
3
Alright, thanks again myininaya :)