Find each of the following in the x+iy form and compare a computer solution.

tanh-(i3).

Short Answer

Expert verified

The x+iyform of the given equation tanh-1i3 is iπ3±nπ

Step by step solution

01

Given Information.

The given expression is, tanh-1i3.

02

Meaning of rectangular form.

Represent the complex number in rectangular form means writing the given complex number in the form of x+iy in which x is the real part and y is the imaginary part.

03

Convert into polar form.

Consider the complex number is, z=tanh-1i3.

Rewrite the above expression.

tanhz=i3

Write the formula for θ.

ez-e-zez+e-z=i3

Multiply it by ezez.

e2z-1=i3e2z+i3e2z1-i3=1+i3e2z=1+i31i3

04

Convert in rectangular form

Take the logarithm function both sides.

2z=In1+i31-i32z=In2eπ/32e-π/32z=i2π3±2nπ

2z=i2π3±2nπ Where n=0,1,2,3,..

z=iπ3±nπ. Where n=0,1,2,3,..n=0,1,2,3,...

Hence the general solution is z=iπ3±nπ.

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Most popular questions from this chapter

Solve for all possible values of the real numbers x and y in the following equations.

(x+iy)3=-1

Express the following complex numbers in the x+iy form. Try to visualize each complex number, using sketches as in the examples if necessary. The first twelve problems you should be able to do in your head (and maybe some of the others—try it!) Doing a problem quickly in your head saves time over using a computer. Remember that the point in doing problems like this is to gain skill in manipulating complex expressions, so a good study method is to do the problems by hand and use a computer to check your answers.

18.1+i1i4

For each of the following numbers, first visualize where it is in the complex plane. With a little practice you can quickly findin your head for these simple problems. Then plot the number and label it in five ways as in Figure 3.3. Also plot the complex conjugate of the number.

2e-iπ4.

Question. Express the following complex numbers in the form. Try to visualize each complex number, using sketches as in the examples if necessary. The first twelve problems you should be able to do in your head (and maybe some of the others—try it!) Doing a problem quickly in your head saves time over using a computer. Remember that the point in doing problems like this is to gain skill in manipulating complex expressions, so a good study method is to do the problems by hand and use a computer to check your answers.

24. (1-i3)21(i-1)38

Express the following complex numbers in the x+iyform. Try to visualize each complex number, using sketches as in the examples if necessary. The first twelve problems you should be able to do in your head (and maybe some of the others—try it!) Doing a problem quickly in your head saves time over using a computer. Remember that the point in doing problems like this is to gain skill in manipulating complex expressions, so a good study method is to do the problems by hand and use a computer to check your answers.

10.role="math" localid="1653071800850" eiπ+e-iπ

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