SOLUTION: <pre> {{{f(x)}}}{{{""=""}}}{{{system(matrix(2,3, (1-cos(ax))/(x*sin(x)),if,x<>0, 1/2,if,x=0))}}} Find the value of "a" such that the function is continuous at x=0</pre>

Algebra ->  College  -> Linear Algebra -> SOLUTION: <pre> {{{f(x)}}}{{{""=""}}}{{{system(matrix(2,3, (1-cos(ax))/(x*sin(x)),if,x<>0, 1/2,if,x=0))}}} Find the value of "a" such that the function is continuous at x=0</pre>      Log On


   



Question 992139:
f%28x%29%22%22=%22%22
Find the value of "a" such that the function is 
continuous at x=0

Answer by Edwin McCravy(20054) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29%22%22=%22%22
Find the value of "a" such that the function is
continuous at x=0
f(x) will be continuous at x=0 if and only if

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We use L'Hopital's rule on the left side:

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We use L'Hopital's rule again on the left side:

%22%22=%22%221%2F2

%28a%5E2%2Acos%28a%2A0%29%29%2F%28-0%2Asin%280%29%2B2cos%280%29%29%22%22=%22%221%2F2

%28a%5E2%2A1%29%2F%28-0%2A0%2B2%2A1%29%22%22=%22%221%2F2

a%5E2%2F2%22%22=%22%221%2F2

a%5E2%22%22=%22%221

a%22%22=%22%22%22%22+%2B-+1

Edwin