Rewrite <span>2cos x + 1 = 0 as:
2 cos x = -1, and then cos x = -1/2
x must be in Quadrant II or Quadrant III, since the adj. side is negative.
Note that the angle 120 has adj. side -1 and hyp 2. So 120 degrees is one solution.
Now what about a possible 2nd solution, to be found in Quadrant III? That would be -120 degrees, which has the same terminal line as does 240 degrees.
No soap.
So, the solution is 120 degrees.</span>
Answer:
80 percent of 9 is 4/5th of 9, which is 36/5 or 7.2
Hope this helped and brainliest please
Answer:
y=-16^a/x^2 + 4
Step-by-step explanation:
Answer:
45
Step-by-step explanation:
They add up to 90, so 90 - 45 = 45 degrees
