tan(7pi/8) = tan(7pi/4/2)
hence
tan(7pi/8)=sin(7pi/4)/(1+cos(7pi/4))
sin(7pi/4)=-(root2)/2
cos(7pi/4)=(root2)/2
so
tan(7pi/8)= -(root2)/2/(1+(root2)/2)
and then tidy up.
Sorry about the expressions, not easy to do in text.
Use the half angle formula to find the exact value of
tan 7 pie/8
2 answers
How do you tidy it up?