# What is SECH X?

## What is SECH X?

Hyperbolic secant: sech(x) = 1 cosh(x) = 2 ex + e−x.

## What is the derivative of cosh X?

Hyperbolic Functions

Function Derivative Integral
cosh(x) sinh(x) sinh(x)
tanh(x) 1-tanh(x)² ln(cosh(x))
coth(x) 1-coth(x)² ln(|sinh(x)|)
sech(x) -sech(x)*tanh(x) atan(sinh(x))

What is the value of sin hyperbolic X?

and the hyperbolic sine is the function sinhx=ex−e−x2.

### What is the derivative of SECH 2x?

Derivatives of Hyperbolic Functions

Function Derivative
coshx=sinhx (ex-e-x)/2
tanhx sech2x
sechx -tanhx∙sechx
cschx -cothx∙cschx

### How do you calculate Coshx?

cosh x = ex + e−x 2 . The function satisfies the conditions cosh 0 = 1 and coshx = cosh(−x). The graph of cosh x is always above the graphs of ex/2 and e−x/2.

How is the expansion of space different from everyday life?

The metric expansion of space is a completely different kind of expansion than the expansions and explosions seen in daily life. It also seems to be a property of the universe as a whole rather than a phenomenon that applies just to one part of the universe or can be observed from “outside” it.

#### Is the universe still expanding after the Big Bang?

Less than a second after the Big Bang, the universe suddenly blew up from nothing to a hot, dense sea of neutrons and electrons stretching across billions of lightyears. And, 13.8 billion years later, the universe is still expanding, albeit at a much slower rate.

#### How is the expansion of the Universe related to its time in transit?

While it always moves locally at c, its time in transit (about 13 billion years) is not related to the distance traveled in any simple way since the universe expands as the light beam traverses space and time. In fact the distance traveled is inherently ambiguous because of the changing scale of the universe.

Which is the best evidence for the expansion of the universe?

Theoretical basis and first evidence 1 Hubble’s concerns over the rate of expansion. [If the redshifts are a Doppler shift …] the observations as they stand lead to the anomaly of a closed universe, curiously small 2 Inflation as an explanation for the expansion. 3 Measuring distance in a metric space.