Answer:
D.∞
brainliest would be appreciated!
12.45 pm
7.30 pm
00 00
20 15
30 I think but I'm probably wrong
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.