If working in radians, the cosine of one-quarter of pi is equal to the square root of 0.5. Squaring this gives 0.5, or exactly one-half.
No. Pi is a neverending number.
pi is approximately equal to: 3.141592653589793238462643383279...
When you multiply 12.8 times pi the exact answer is12.8 Pi, but you can round off the answer to40.192because pi is about equal to 3.14.
sin(pi/4) and cos(pi/4) are both the same. They both equal (√2)/2≈0.7071■
No it does not exactly equal 3. Pi (that's how you spell it in math terms) exactly equals 3.14159265*just a note Pi does not in fact equal exactly 3.14159265 it is an irrational number therefor has no exact value although its decimal places will continue infinitely :)
The area of a circle is {pi} x radius2. 12 = 1, so: a circle of radius 1 unit has an area of exactly pi units2
36 pi = 113.09734 (rounded)(Since 'pi' is irrational and can never be written exactly, no sum, difference,product, or quotient that involves it [once] can be written exactly either.)
Pi can't be exactly expressed as a fraction, or as a decimal. It is approximately equal to 3.14159265, but for many practical calculations you may want to round it to 3.14, or to 3.1416.
Pi is an "irrational" number, which means that there are no integers that form a ratio exactly equal to pi. In other words, you cannot divide any whole number by any other whole number to get pi. 22/7 isn't too far off, and 355/113 is fairly close, but they're not exactly pi.
n squared x n = n cubed but that does not equal 21. ---------------------------------------------------------------- Here is the correct version: We are looking for Pi squared times Pi which is Pi cubed Now Pi can never be written out exactly because its decimal number goes on for ever. However we can take a good approximation to Pi as 3.142 So Pi cubed = 3.142 x 3.142 x 3.142 = 31.018339 = 31.02 to 4 places.
If working in radians, the cosine of one-quarter of pi is equal to the square root of 0.5. Squaring this gives 0.5, or exactly one-half.
Pi is not equal to 6. It is equal to 3.14159...
pi^2
Pi is approximately equal to 3.141592652389793238462.
12/pi is equal to 12/pi, 12/3.14 (most common rounding of Pi) is about 3.822
pi is equal to 3.14