Question 865917
{{{sqrt(2*sin(D)*cos(D))=sin(D)}}}
{{{2*sin(D)*cos(D)=sin^2(D)}}}
{{{sin^2(D)-2*sin(D)*cos(D)=0}}}
{{{sin(D)*(sin(D)-2cos(D))=0}}}
Two solutions:
{{{sin(D)=0}}}
{{{D=0}}} and {{{D=180}}}
and
{{{sin(D)=2*cos(D)}}}
{{{tan(D)=2}}}
{{{D=tan^(-1)(2)}}}
or approximately
{{{D=63.4}}} and {{{D=243.4}}}