Help please
I should be able to just apply x into the function but I'm having trouble solving
lim x->-13*pi/14 cos(7x-cox(7x))
I get to
cos(-13*pi/2 - cos(-13*pi/2))
what next?
Thanks
Help please
I should be able to just apply x into the function but I'm having trouble solving
lim x->-13*pi/14 cos(7x-cox(7x))
I get to
cos(-13*pi/2 - cos(-13*pi/2))
what next?
Thanks
Last edited by muzik; 02-02-2018 at 05:15 PM.
Yes, since the cosine is continuous (and I assume you meant cos everywhere, not cox), you just have to find the value of cos(7x - cos(7x)) when x = -13*pi/14. But that is not what you did. Is that just more typos, or is the problem something other than what you wrote? You don't seem to have multiplied by 7 in either place. You should have
cos(7(-13*pi/14) - cos(7(-13*pi/14)))
Once you do the right substitution, just use a calculator to do what you wrote!
Thanks for the replies and sorry for the typos
Stapel, Yes that's correct interpretation.
ok if I enter into calculator I get 0.8414.
It's my last attempt on the answer for the problem. Does 0.8414 sound right?
The requirement is to "Simplify your answer" Usually it will say up to 4 decimal places.
I was trying to simplify. The 7 with the denominator 14. so with out the cosine I was trying to simplify 7(-13*pi/14) so I that's how I got -13*pi/2. oops and I wrote -13*pi/7 in my earlier post.
I'm just thinking the answer is not in decimal form.
Thanks for your help.
So i'm down to
cos((-pi/2)-cos(-pi/2)) correct?
=cos((-pi/2)-0)
=cos(0-0)
=cos (0)
=1
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