Find the value of tan x is sin(x) + cos(x) = 1/5 and pi/2 < x < pi.
Sin x = 4/5 or - 3/5
Cos x = -3/5 or 4/5
for quadrant II sin is positive so 4/5
and cos is negative so -3/5
then tan = sin/cos = 4/5 / -3/5 = - 4/3
Thanks for answering EP
But I do not understand your logic.
Here's a little more detail:
ok thanks for the explanation Alan :)