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An arc on a circle measures [tex]\( 295^{\circ} \)[/tex]. The measure of the central angle, in radians, is within which range?

A. [tex]\( 0 \)[/tex] to [tex]\( \frac{\pi}{2} \)[/tex] radians
B. [tex]\( \frac{\pi}{2} \)[/tex] to [tex]\( \pi \)[/tex] radians
C. [tex]\( \pi \)[/tex] to [tex]\( \frac{3\pi}{2} \)[/tex] radians
D. [tex]\( \frac{3\pi}{2} \)[/tex] to [tex]\( 2\pi \)[/tex] radians


Sagot :

To determine the measure of the central angle in radians and identify its range, follow these steps:

### Step 1: Convert the Angle from Degrees to Radians

Given the central angle measures [tex]\( 295^\circ \)[/tex] in degrees, we first need to convert this measurement to radians. The conversion factor between degrees and radians is:

[tex]\[ 1^\circ = \frac{\pi}{180} \text{ radians} \][/tex]

So, to convert [tex]\( 295^\circ \)[/tex] to radians, we use the formula:

[tex]\[ \text{angle\_rad} = 295 \times \left(\frac{\pi}{180}\right) \][/tex]

### Step 2: Calculate the Exact Radian Measure

The calculation gives us:

[tex]\[ 295 \times \left(\frac{\pi}{180}\right) = 5.1487212933832724 \text{ radians} \][/tex]

### Step 3: Determine the Range in Radians

Now, we need to determine which of the provided ranges this angle falls into:

1. [tex]\( 0 \leq \theta < \frac{\pi}{2} \)[/tex]
2. [tex]\( \frac{\pi}{2} \leq \theta < \pi \)[/tex]
3. [tex]\( \pi \leq \theta < \frac{3\pi}{2} \)[/tex]
4. [tex]\( \frac{3\pi}{2} \leq \theta < 2\pi \)[/tex]

Substitute the known value [tex]\( \theta = 5.1487212933832724 \text{ radians} \)[/tex]:

- [tex]\(0\)[/tex] to [tex]\(\frac{\pi}{2} \approx 0 < \theta < 1.571 \text{ radians} \)[/tex]
- [tex]\(\frac{\pi}{2}\)[/tex] to [tex]\(\pi \approx 1.571 \leq \theta < 3.142 \text{ radians} \)[/tex]
- [tex]\(\pi\)[/tex] to [tex]\(\frac{3\pi}{2} \approx 3.142 \leq \theta < 4.712 \text{ radians} \ ) - \(\frac{3\pi}{2}\)[/tex] to [tex]\(2\pi \approx 4.712 \leq \theta < 6.283 \text{ radians} \)[/tex]

Since [tex]\(5.1487212933832724 > 4.712\)[/tex], it is clear that [tex]\(5.1487212933832724 < 6.283 \)[/tex].

Therefore, [tex]\(5.1487212933832724\)[/tex] radians falls into the range:

[tex]\[ \boxed{\frac{3\pi}{2} \text{ to } 2\pi} \][/tex]

This means the angle is within the range:

[tex]\[ \boxed{\frac{3\pi}{2} \text{ to } 2\pi \text{ radians}} \][/tex]
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