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What is the derivative of cos pi x?
-(pi)*sin(pi*x)
What is x equal y sq over cos x pi?
Can you please claify if you mean x=y^2/ pi*cos(x) , or x=y^2/cos(pi), since they are very different sums.
Square root x plus 3 equals 12?
X = 81 sqrt(X) + 3 = 12 ( subtract 3 from each side ) sqrt(X) = 9 (square both sides ) X = 81 ( the square root of 81 is 9 )
What x what equals 81?
9x9=81
What is the integral of x sin pi x?
The method to use is 'integration by parts'; set u =x; du=dx; dv = sin(pi x)dx; v = cos(pi x)/pi. so integral(u dv) = u*v - integral(v du) then repeat the process.
What is the circumference of a circle with an area of 81?
In every circle . . .Area = (pi) x (radius)2Diameter = 2 x radiusCircumference = (pi) x diameterIn this circle, Area = (pi) R2 = 81R2 = 81/piR = sqrt( 81/pi )Diameter = 2 x sqrt( 81/pi )Circumference = (pi) x 2 x sqrt( 81/pi ) = 2 x sqrt( 81 pi ) = 18 sqrt(pi) = 31.9042 (rounded)
What is the volume of a cylinder with a radius of 9 cm and a height of 8 cm?
648pi. (pi = 3.14159...)Area of a circle = (pi) x (radius squared)= (pi)(9 squared) = (pi)81.Area of a cylinder = area of circle x height.= (pi)81 x 8= 648(pi)
What is 81 times pi?
81 x 355/113 = 254.47 to 2 places of decimals
What is pi r squared times three to the fourth power?
(pi) R2 x 34 = 81 pi R2
How do you determine the volume of a cup that has a diameter of 9 cm and the height of 8 cm?
Multiply 9 x 8. Volume = Pi/4 x D2 x H so Volume = Pi/4*81*8 = Pi*81*2 = 508.938 cubic cm.
What is the surface area of a sphere with a radius of 4.5?
The diameter is 2r = 9 The surface area is Pi x diameter2 = Pi x 81 or 254.469 square units.
How many square feet are in an 18 foot circle?
18 ft diameter is assumed. Area = Pi/4 x 182 = Pi x 81 = 254.469 ft2
What is the the area of a circle with a radius of 9?
Area= pi x radius squared. So radius (9) squared = 81, 81 x 3.14. See related link for more info.
What is the radius if the area of the garden is 81 times pi ft?
The radius is 9 feet because pi*92 = 81*pi
If the diameter of a circle is 18 what is the area with pi?
Area of circle: 81*pi square units
What is the circumference of a 81 cm?
The circumference = 2 x r x pi If your diamter is 81cm then your circumference is 254.5cm If your radius is 81cm then your circumference is 508.9cm
How do you find the radius of a circle if area is 81 pi?
Divide the 81 pi by pi, then square root it. (Use the formula for area of circle, which gives 81pi=pi*radius squared, but rearrange to find the radius). i.e. it's the square root of 81
