-1
it's a special equation
i * pi / 2.
Assuming you are asking about the natural logarithms (base e):log (-1) = i x pithereforelog (log -1) = log (i x pi) = log i + log pi = (pi/2)i + log pi which is approximately 1.14472989 + 1.57079633 i
By Euler's formula, e^ix = cosx + i*sinx Taking natural logarithms, ix = ln(cosx + i*sinx) When x = pi/2, i*pi/2 = ln(i) But ln(i) = log(i)/log(e) where log represents logarithms to base 10. That is, i*pi/2 = log(i)/log(e) And therefore log(i) = i*pi/2*log(e) = i*0.682188 or 0.682*i to three decimal places.
Pi minus 2, Square root of 3, fourth root of 8, Natural Log of 7, e (base of natural logs), pi squared,.... There are an infinite number of them.
E to the pi i equals negative one because of a string of properties. Namely logarithmic properties. When you take the natural log of both sides you are able to bring the exponent of pi and i down. And replace the ln of e with 1. When you keep the natural log of negative 1 you get 3.145....i or pi times i. To understand this natural log place you must go back to the original equation E^pi i. When you take the i root of both sides you get e to the pi alone, and have the i root of negative one. By doing this you are just raising negative 1 to the inverse of i, negative i. When you do this you end up with 23.14069263....... because of derivatives. Guess what e to the pi is. you guessed right 23.14069263. This is commonly known as Eulers's identity. If you want the more in depth understanding google it, or bing whatever you prefer.
logpi100 = log10100/log10pi = 2/log(pi) = 4.02293 (approx)logpi100 = log10100/log10pi = 2/log(pi) = 4.02293 (approx)logpi100 = log10100/log10pi = 2/log(pi) = 4.02293 (approx)logpi100 = log10100/log10pi = 2/log(pi) = 4.02293 (approx)
It equals 0.4971
xlog10 = x This is a simple rule of logs, because log(base10)10 = 1. Any value multiplied by one equals itself. So pi*log10 = pi(1) = pi.
2 log(x)derivative form:d/dx(2 log(x)) = 2/x
the same as pi squared, which is 9.86960440109
To make a natural log a log with the base of 10, you take ten to the power of you natural log. Ex: ln15=log10ln15=log510.5640138 I'm sorry if you don't have a calculator that can do this, but this will work.
Circumference = pi times the diameter, or pi times 2 times radius. Area = pi times (radius squared)