Answer:
Step-by-step explanation:
cos x=sin 2x
sin 2x-cos x=0
2 sin x cos x-cos x=0
cos x(2 sin x-1)=0
either cos x=0
![x=\frac{\pi }{2},\frac{3\pi }{2}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B%5Cpi%20%7D%7B2%7D%2C%5Cfrac%7B3%5Cpi%20%7D%7B2%7D)
or
2 sin x-1=0
![sin x=\frac{1}{2} =sin (\frac{\pi }{6}),sin(\pi -\frac{\pi }{6} )\\x=\frac{\pi }{6} ,\frac{5 \pi }{6}](https://tex.z-dn.net/?f=sin%20x%3D%5Cfrac%7B1%7D%7B2%7D%20%3Dsin%20%28%5Cfrac%7B%5Cpi%20%7D%7B6%7D%29%2Csin%28%5Cpi%20-%5Cfrac%7B%5Cpi%20%7D%7B6%7D%20%29%5C%5Cx%3D%5Cfrac%7B%5Cpi%20%7D%7B6%7D%20%2C%5Cfrac%7B5%20%5Cpi%20%7D%7B6%7D)
Answer:
Either 4+4=8 then take 1 away to get 7 or 3+3=6 then add 1 to get 7.
Step-by-step explanation:
Intuitively, one would think the ball would land in the green spot 2 out of the 38 times, since there are 38 slots and 2 are green.
The probability that it lands in a green section is 2/38. Multiplying this by the number of times the experiment is performed, we get (2/38)(38) = 2.
Answer:
For this case we have by definition, that an irrational number is a number that can not be expressed as a fraction \ frac {a} {b}, where a and b are integers and b is different from zero.
A) , it is rational
B), it is rational
C) , it is rational
D) it is not rational.
Step-by-step explanation:
dddddd its dddd
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