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Mekhanik [1.2K]
3 years ago
14

Write each complex number in rectangular form.

Mathematics
1 answer:
hram777 [196]3 years ago
4 0
Hello,

A)
cos 135°=- cos 45°=-√2/2
sin 135°=sin45°=√2/2
2(cos 135°+i sin 135°)=-√2 + i*√2

B)
cos 120°=-cos 30°=-√3 /2
sin 120°=sin 30°=1/2

3(cos 120° + i sin 120)=-3/2*√3 +i*3/2

C)
cos (5π/4)=-cos (π/4)=-√2 /2
sin (5π/4)= -sin(π/4)=-√2 /2
5(cos (5π/4)+i sin (5π/4))=-5/2*√2 +i *5/2*√2

D)
cos(5π/3)=cos(π/3)=√3 /2
sin (5π/3)=-sin(π/3)=-1/2

4(cos(5pi/3)+i sin (5pi/3))
=2√3- 2*i


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If the function rule is y equals 3x - 4 what is range when the domain is 7?​
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Domain is another word for the x value. so, this question just asking us to solve for y when x = 7

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y = 3(7) -4

and then solve for y

y = 21 - 4
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(Please help I am in tears)<br><br> Simplify ( 6 x^−2 )^2 ( 0 . 5 x )^4 . Show your work.
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Step-by-step explanation:


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The Wall Street Journal reports that the rate on three-year Treasury securities is 7.00 percent, and the six-year Treasury rate
Art [367]

Maturity risk for 3 year Treasury security is 0.1%

<u>Explanation:</u>

Given -

Rate of 3 year Treasury security, R3 = 7%

Rate of 6 year Treasury security, R6 = 6.2%

Rate of inflation, Ri = 2.25% next year, 2.5% on 2nd year, 2.5% on 3rd year

Real interest rate, Rint = 4.4%

Maturity risk on 3 year Treasury security, x = ?

Maturity risk for 3 year Treasury security:

R3 = Ri on 3rd year + Rint + x

7% = 2.5% + 4.4% + x

x = 0.1%

Therefore, Maturity risk for 3 year Treasury security is 0.1%

8 0
4 years ago
Given functions f ( x ) = 1 √ x and m ( x ) = x 2 − 4 , state the domains of the following functions using interval notation.
babunello [35]

The domain of a function f(x)/m(x) = 1/√x(x² - 4) is (0, ∞) - {0, 2, -2} for other function is shown in the solution.

<h3>What is a function?</h3>

It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.

We have:

f(x) =  1/√x

m(x) = x² - 4

Domain of f(x)/m(x):

f(x)/m(x) = (1/√x)/(x² - 4)

f(x)/m(x) = 1/√x(x² - 4)

The denominator cannot be zero:

√x(x² - 4) ≠ 0

x(x - 2)(x+2) ≠ 0

x ≠ 0, 2, -2

and x > 0

Domain of f(x)/m(x) is:   (0, ∞) - {0, 2, -2} or \:\left(0,\:2\right)\cup \left(2,\:\infty \:\right)

Domain of f(m(x)):

f(m(x)) = 1/√(x² - 4)

x² - 4 > 0

Domain: \rm \left(-\infty \:,\:-2\right)\cup \left(2,\:\infty \:\right)

Domain of m(f(x)):

= ((1/√x)² - 4)

Domain: \:\left(0,\:\infty \:\right)

Thus, the domain of a function f(x)/m(x) = 1/√x(x² - 4) is (0, ∞) - {0, 2, -2} for other function is shown in the solution.

Learn more about the function here:

brainly.com/question/5245372

#SPJ1

7 0
3 years ago
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