Question

What is the limit of 3(1-tan x)sec x as it goes to pi/4?? Isn't it 2.94

Answer 1

I plugged in pi over 3 into the equation, I get 2.95, and it says it's wrong.

Answer 2

how do you get anything but 0?

Answer 3

http://s11.postimage.org/itf544cfl/Problem2.png

Answer 4

tan(pi/4) =1

Answer 5

ahhh, I accidentally had the mode on my calculator set to 'degree' instead of 'radians'

Answer 6

but even with radians, it gives me -1.24 as the final answer.

Answer 7

Which is wrong....

Answer 8

I have one more attempt on this problem >.>, otherwise it counts that I got it wrong.

Answer 9

"x as it goes to pi/4??"

Answer 10

yes.

Answer 11

x-> pi/4 ?

Answer 12

yeah, http://s11.postimage.org/itf544cfl/Problem2.png thats the problem

Answer 13

There is not a need for L'hopitals rule considering that it's not something like infinity times infinity etc.
The answer should be -1.24..

Answer 14

Am I wrong?

Answer 15

don't know what the problem is, so it's impossible to say.

Answer 16

Is the answer I'm getting correct? -1.24?

Answer 17

The website could be messing up.

Answer 18

A few students had that as well.

Answer 19

not clicking your hilarious link.

Answer 20

?? That's a screenshot of the problem..

Answer 21

'Hilarious' link? lol?

Answer 22

cool story. upload it to OS.

Answer 23

OS?

Answer 24

Oh to openstudy

Answer 25

there.

Answer 26

http://i.imgur.com/CMgMz.gif

Answer 27

\[\huge \huge \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \]

Answer 28

Limit is zero

Answer 29

how did you get 0?

Answer 30

ah I think I got it. 1 - tan ( pi / 4 ) is 1- 1..so anything times 0..= 0..thats y?

Answer 31

\[ \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 }\frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 }\frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 }\frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 } \frac {\pi }{4 }\]

Answer 32

Ignore the 3 and sec x. lim 1-tanx as x approaches pi/4 equals zero because tan of pi/4 equals one

Answer 33

Ah, I see. Very weird, the calculator kept giving me -1.24 o.O

Answer 34

Okay, 0 worked :). Thanks