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Which angles are coterminal with 3pi/2?
The answer choices are:
11pi/2
-pi/2
Pi/2
-7pi/2

Respuesta :

Answer:

[tex]-\frac{\pi }{2}, \frac{11\pi }{2}[/tex]

Step-by-step explanation:

Coterminal angles are angles with the same initial and terminal side. In this question, the unit is Radians. They can be found algebraically by this formula for 3π/2:

[tex]\frac{3\pi }{2}\pm k2\pi \leqslant 2\pi[/tex] where K is an integer number for the number of "laps" around the origin (360º or 2π rad),  with a positive or negative direction .

So let's check some coterminal angles with [tex]\frac{3\pi }{2}[/tex]

[tex]\frac{3\pi }{2}-2\pi =-\frac{\pi }{2}\\\Rightarrow \frac{3\pi }{2}+2\pi =\frac{7\pi }{2}\\\frac{3\pi }{2}+2*2\pi =\frac{11\pi }{2}\\\Rightarrow \frac{3\pi }{2}-2*2\pi =\frac{5\pi }{2}\\\frac{3\pi }{2}-3*2\pi=-\frac{9\pi }{2}\\\Rightarrow \frac{3\pi }{2}+3*2\pi=-\frac{15\pi }{2}[/tex]

(...)

From the given list, coterminal angles:

[tex]-\frac{\pi }{2}[/tex]

[tex]\frac{11\pi }{2}[/tex]

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Coterminal angles are angles that are measured from the positive x-axis. The coterminal angle of    [tex]\dfrac{3\pi}{2}[/tex] is [tex]-\dfrac{\pi}{2}[/tex].

What are coterminal angles?

Coterminal angles are angles that are measured from the positive x-axis of the coordinate plane.

Given to us

Angle = [tex]\dfrac{3\pi}{2}[/tex]

As we have given the angle [tex]\dfrac{3\pi}{2}[/tex] from the positive x-axis but it is from the anticlockwise direction. To find the same angle from the clockwise direction we will deduct this angle from 360°(2π) and add a negative sign to show that it is been calculated from the clockwise direction.

[tex]2 \pi - \dfrac{3\pi}{2}\\\\=\dfrac{4\pi -3\pi}{2}\\\\= \dfrac{\pi}{2}[/tex]

Thus, the measure of the angel from the x-axis in the clockwise direction can be denoted as [tex]-\dfrac{\pi}{2}[/tex].

Hence, the coterminal angle of    [tex]\dfrac{3\pi}{2}[/tex] is [tex]-\dfrac{\pi}{2}[/tex].

Learn more about Coterminal Angle:

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