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:
To find the area of a rectangle multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area. This is the same as saying length2 or length squared.
Step-by-step explanation:
Answer:
Intercept form 
The standard form of the equation of the line
4 x + 5 y +20 =0
Step-by-step explanation:
<u><em>Explanation</em></u>
Given that x-intercept (a) = -5
and y-intercept (b) = -4
Intercept form
⇒ 
4 x + 5 y = -20
<u><em>Final answer:-</em></u>
The standard form of the equation of the line
4 x + 5 y +20 =0
I think the answer is 4. 12× 1/3= 4
