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.
This might be a bit of a cheap answer, but: Of all shapes, circles have the highest area/perimeter ratio; that is, they have a maximum area for a minimum perimeter. 1000 = circumference = 2 pi r r = about 159.155 m area = pi (r squared) = about 79577.538 sq. m using pi = 3.14159
16 x 28 sq ft...
cabla sq,mm to amps
quick down and dirty way is the size of your unit (example..4 tons) X 144= the square inches needed for the return vent size or the longer way Max air flow from unit (rated size) / 2.08 cfm/sq in= filter area needed
To calculate the appropriate size of an oil-fired boiler for a forced hot water heating system in a 3,100 sq ft house in Massachusetts, you typically use the heat loss calculation method. This involves assessing factors such as the home's insulation, window efficiency, local climate, and desired indoor temperature, often expressed in BTUs (British Thermal Units). A rough estimate for a well-insulated home is about 30-40 BTUs per square foot, which would suggest a boiler capacity of approximately 93,000 to 124,000 BTUs. It's advisable to consult with a heating professional for a precise calculation tailored to your specific home conditions.
Again, please clarify the question. Either "x=y^2/cos(x)*pi " or "x=y^2/cos(pi)". From the question it is not possible to tell whether the second "x" is a variable, or a multiplier sign (and if it were a multiplier, you're question is omitting a variable on the cos(x)).
The equation cannot be proved because of the scattered parts.
- (sq rt 2)/2 approx. -0.7071
It is: cos(15) = (sq rt of 6+sq rt of 2)/4
36 pi: ie 36 x 355/113 = 113 sq in "and a little bit over"
a = pi r sq. a = pi 14 sq. or pi 196 a= pi X 196 if you leave in terms of pi
Area of 30 inch circle = pi*302 sq inches Area of 18 inch circle = pi*182 sq inches Difference = pi*(302 - 182) = 576*pi sq inches 1 sq foot = 1 ft*1 ft = 12 inches*12 inches = 144 sq inches so 576*pi sq inches = 576/144 *pi sq ft = 4*pi sq ft = 12.57 sq ft.
Surface area = 2*pi*r2+ 2*pi*r*h = 1105.8 sq units.=Surface area = 2*pi*r2+ 2*pi*r*h = 1105.8 sq units.=Surface area = 2*pi*r2+ 2*pi*r*h = 1105.8 sq units.=Surface area = 2*pi*r2+ 2*pi*r*h = 1105.8 sq units.=
eix = cos(x) + i*sin(x) where e is the irrational number 2.7182... i is the maginary sq root of -1 and x is measured in radians. In the special case when x = pi, this reduces to: eiπ = cos(π) + i*sin(π) or eiπ = -1
It is: 2*radius = square root of (616/pi) = 28 inches to the nearest integer
If a circle has radius r, the area of the circle is pi X r2 and the circumference of the circle is 2 X pi X r. Therefore, the radius of the circle specified is (sq rt of n)/pi and the circumference is 2 X pi X [(sq rt of n)/pi]/pi = 2 X [(sq rt of n)/pi].
Area = pi*(diameter/2)2 = pi*(2/2)2 = pi So pi sq metres = 3.14159 sq metres (to 5 dp)