Question

cosec x= 4 ,x is in 2nd quadrant find sin x/2, cos x/2,tan x/2​

Answer 1

Step-by-step explanation:

Given that x is in second quadrant

90<x<180

45<2x<90

2x lies in first quadrant

So,

sinx,cosx,tanx are positive in  first quadrant

tanx=1−tan22x2tan(2x)

3−4=1−tan22x2tan(2x)