Question 883201
Using a half angle identity, find the value of {{{tan((13pi)/12)}}}
{{{tan((13pi)/12)=tan(13pi/6)/2=(sin((13pi)/6))/(1+cos((13pi)/6))=(1/2)/(1+(sqrt(3)/2))
=(1/2)/((2+sqrt(3))/2)=1/(2+sqrt(3))}}}