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91Ó°ÊÓ

Find each of the following in the x+iy form and check your answers by computer.

cosh(2Ï€i)

Short Answer

Expert verified

cosh2Ï€ican be written in the form of 1+0i=1.

Step by step solution

01

Given Information.

The given expression is cosh2Ï€i.

02

Definition of Complex Numberand Hyperbolic functions.

The domain of a function refers to the range of values that can be plugged into it. This is the set of x values in a function like f (x) . The range of a function is the set of values that the function can take. This is the set of values that the function produces when we enter x value. The y values are what you're looking for.

The basic hyperbolic functions are:

  1. Hyperbolic sine(sinh)
  2. Hyperbolic cosine(cosh)
  3. Hyperbolic tangent(tanh)
03

Write cosh(2πi) in the form of (x+iy) .

Letu=cosh2Ï€iu=cosh2Ï€i

It is known that

coshxi=cosxu=cos2x1.

Hence, cosh2Ï€i can be written in the form of 1+0i=1.

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