1.1x -1.8 should be the answer.
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.
I'm pretty sure the answer is D bc it has the same coefficients and the same numbers
The answer is B hope it helped you
<span>twice the sum of a number and seven is 8
2(x+7)=8</span>