The zeroes are -1/2 and -2
last option
First, we are going to add
from both sides of the equation:
Next, we are going to use the trig identity:
to rewrite our expression:
Finally, using our unitary circle, we can infer that
from 0 to
when
and
We can conclude that the solutions of the equation <span>cos (x) tan (x) -1/2=0 over the interval [0,2π] are: </span>