Question

arctan(2x)+tan(x)=pi/4, what is x?

Answer 1

arctan(2x)+tan(x)=pi/4 ??
or
arctan(2x)+arctan(x)=pi/4

Answer 2

if it is latter, then use
arctanA+arctanB = arctan((A+B)/(1-AB))
then take tan on both sides. tan pi/4=1

Answer 3

u get 3x=1-2x^2
solve this quadatic

Answer 4

thanks!! i had solve it now :))

could you answer the other question i had closed?? the one with the round holes?