cos 2x – cosx = 0
------------ (1)
where cos2x = 2cos^2x –
1
equation (1) becomes;
<span>2cos^2x – 1 – cosx = 0 ------------ (2)</span>
Suppose cosx = y, then
equation (2) becomes;
2y^2 – 1 – y = 0
By factorization method;
(2y + 1) x (y – 1) = 0
Where 2y + 1 = 0 or y –
1 = 0
So solving both;
y = -1/2 or 1
As y = cosx
So cosx = -1/2 or 1
The above equation is true only for x = 2/3π, 0, 4/3 π
<span>The solution were find out for interval [0,2 π),
where 2 π is not included in the interval, as the interval is not a closed on
the right side.</span>
Answer:
The answer is actually 6 spots for every 2 eyes, and 3 spots for every one eye.
Step-by-step explanation:
If you look at the 2 eyes you should have gotten an idea of 3x2=6 and for the second one your idea should have been 1x3=3.
Interest earned is $ 8.75
Total amount of money earned=708.75
Please see the attached picture for full solution
Hope it helps..
Good luck on your assignment