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Which of the following represents the measures of all angles coterminal with a [tex]\( -220^\circ \)[/tex] angle?

A. [tex]\( 360 + 140n \)[/tex], for any whole number [tex]\( n \)[/tex]
B. [tex]\( 360 + 140n \)[/tex], for any integer [tex]\( n \)[/tex]
C. [tex]\( 140 + 360n \)[/tex], for any whole number [tex]\( n \)[/tex]
D. [tex]\( 140 + 360n \)[/tex], for any integer [tex]\( n \)[/tex]


Sagot :

To find the measures of all angles coterminal with [tex]\(-220^\circ\)[/tex], we need to find an angle that lies between [tex]\(0^\circ\)[/tex] and [tex]\(360^\circ\)[/tex] which is coterminal with [tex]\(-220^\circ\)[/tex].

Step-by-Step Solution:

1. Understanding Coterminal Angles:
- Two angles are coterminal if, when drawn in standard position, their terminal sides coincide. This happens when they differ by an integer multiple of [tex]\(360^\circ\)[/tex].

2. Finding the Reference Angle:
- To find a positive coterminal angle with [tex]\(-220^\circ\)[/tex], we can add [tex]\(360^\circ\)[/tex] (a full circle) until we get a positive angle.

3. Calculation:
- Add [tex]\(360^\circ\)[/tex] to [tex]\(-220^\circ\)[/tex]:

[tex]\[ -220^\circ + 360^\circ = 140^\circ \][/tex]

- Therefore, [tex]\(140^\circ\)[/tex] is a positive angle that is coterminal with [tex]\(-220^\circ\)[/tex].

4. General Form of Coterminal Angles:
- To express all angles coterminal with [tex]\(-220^\circ\)[/tex], we can use the formula:

[tex]\[ \theta + 360n \][/tex]

- Substituting [tex]\(\theta = 140^\circ\)[/tex]:

[tex]\[ 140^\circ + 360n \][/tex]

- Here, [tex]\(n\)[/tex] can be any integer (positive, negative, or zero) to cover all possible coterminal angles.

5. Final Answer:
- Therefore, the measure of all angles coterminal with [tex]\(-220^\circ\)[/tex] is represented as:

[tex]\[ 140 + 360n, \text{ for any integer } n \][/tex]

So, the correct answer from the choices given is:
[tex]\[ \boxed{140+360n, \text{ for any integer } n} \][/tex]
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