You do what I’d 9-3 , 8-0 , then combined it and you will get the right answer
Answer:
Step-by-step explanation:
<u><em>The picture of the question in the attached figure</em></u>
we know that
The volume of a cone is given by the formula
![V=\frac{1}{3}\pi r^{2}h](https://tex.z-dn.net/?f=V%3D%5Cfrac%7B1%7D%7B3%7D%5Cpi%20r%5E%7B2%7Dh)
we have
![h=2x\ units\\r=x\ units](https://tex.z-dn.net/?f=h%3D2x%5C%20units%5C%5Cr%3Dx%5C%20units)
substitute
![V=\frac{1}{3}\pi x^{2}(2x)](https://tex.z-dn.net/?f=V%3D%5Cfrac%7B1%7D%7B3%7D%5Cpi%20x%5E%7B2%7D%282x%29)
![V=\frac{2}{3}\pi x^{3}\ units^3](https://tex.z-dn.net/?f=V%3D%5Cfrac%7B2%7D%7B3%7D%5Cpi%20x%5E%7B3%7D%5C%20units%5E3)
45% is 9/20. Give me brainliest if I am eligible
Answer:
Step-by-step explanation:
![8(1+cos2x/2)^{2} -4c0s2x+sin4x-4=0\\2(1+2cos2x+cos^{2}2x )-4cos2x+sin4x-4=0\\2cos^{2} 2x+sin4x-2=0\\1+cos4x+sin4x-2=0\\cos4x+sin4x=1\\sin(4x+\pi /4)=sin\frac{\pi }{4} \\\left \{ {{4x+\frac{\pi }{4} =\frac{\pi }{4}+k2\pi } \atop {4x+\frac{\pi }{4} =\frac{3\pi }{4} +k2\pi \\](https://tex.z-dn.net/?f=8%281%2Bcos2x%2F2%29%5E%7B2%7D%20-4c0s2x%2Bsin4x-4%3D0%5C%5C2%281%2B2cos2x%2Bcos%5E%7B2%7D2x%20%29-4cos2x%2Bsin4x-4%3D0%5C%5C2cos%5E%7B2%7D%202x%2Bsin4x-2%3D0%5C%5C1%2Bcos4x%2Bsin4x-2%3D0%5C%5Ccos4x%2Bsin4x%3D1%5C%5Csin%284x%2B%5Cpi%20%2F4%29%3Dsin%5Cfrac%7B%5Cpi%20%7D%7B4%7D%20%5C%5C%3C%3D%3E%5Cleft%20%5C%7B%20%7B%7B4x%2B%5Cfrac%7B%5Cpi%20%7D%7B4%7D%20%3D%5Cfrac%7B%5Cpi%20%7D%7B4%7D%2Bk2%5Cpi%20%20%7D%20%5Catop%20%7B4x%2B%5Cfrac%7B%5Cpi%20%7D%7B4%7D%20%3D%5Cfrac%7B3%5Cpi%20%7D%7B4%7D%20%2Bk2%5Cpi%20%5C%5C)