Answer:
tan x/2 = 3.
Step-by-step explanation:
The adjacent side in the second quadrant of the unit circle = -sqrt(5^2 -3 ^2)
= -4, so cos x = -4/5.
Using the formula tan x/2 = sin x / (1 + cos x) we have
tan x/2 = 3/5 / ( 1 - 4/5)
= 3/5 / 1/5
= 3 (answer).
