Question 1206383
<pre>
ii) Show that *integral* (with limit pi/4 and pi/6) cot x dx = 1/2 ln 2.

{{{int(cot(x),dx,pi/6,pi/4)}}}{{{""=""}}}{{{ln(sin^""(x)^""^"")}}}{{{matrix(3,2,

"|",pi/4,
"|","",
"|",pi/6)}}}{{{""=""}}}{{{ln(sin(pi/4)^"")-ln(sin(pi/6)^"")}}}{{{""=""}}}{{{ln(sqrt(2)/2)-ln(1/2)}}}{{{""=""}}}{{{(ln(sqrt(2))-ln(2)^"")-(ln(1)-ln(2)^"")}}}{{{""=""}}}

{{{ln(sqrt(2))-ln(2)-ln(1)+ln(2)}}}{{{""=""}}}{{{ln(sqrt(2))}}}{{{""=""}}}{{{matrix(3,1,"",ln(2^(1/2)),"")}}}{{{""=""}}}{{{expr(1/2)ln(2)}}}

Edwin</pre>