Question 1152664
<pre>
{{{log(2,cos(x)) = -1/2}}}

{{{matrix(2,1,"",cos(x) = 2^(-1/2))}}}

{{{matrix(2,1,"",cos(x) = 1^""^""/2^(1/2)^"")}}}

{{{matrix(2,1,"",cos(x) = 1/sqrt(2))}}}

{{{matrix(2,1,"",cos(x) = sqrt(2)/2)}}}

{{{matrix(2,1,"",x = 45^o)}}}

Edwin</pre>