Question

find the value of tan x if cos x + sin x is 1 / 2 and x ranges from 0 to π

Answer 1

c+s=1/2
sq. both sides
1+sin2x=1/4
sin2x=-3/4
cos2x=........(u will find)
cos2x=2cos sq. x-1
from here u will get coax and then sinx
and then finally tanx