Answer:
The last one.
Step-by-step explanation:
Answer:
do you still need help for the answer?
Step-by-step explanation:
Im pretty sure it is the first one
When I factor[ 2cos (square) - 5cos -3], I get (2cos + 1)(cos - 3). 2cos + 1 = 0, 2cos = -1, cos = -0.5,. Using inv cos on calculator, I get 120 degree related angle.