Use
sin 0 = 0,

sin

𝜋
2

= 1,
and
sin 𝜋 = 0
to estimate
sin

𝜋
3

.
(Round your answer to three decimal places.)

To estimate \( \sin\left(\frac{\pi}{3}\right) \), we can use the known values:

- \( \sin(0) = 0 \)
- \( \sin\left(\frac{\pi}{2}\right) = 1 \)
- \( \sin(\pi) = 0 \)

These values are known exact values of the sine function at specific points. We need to find \( \sin\left(\frac{\pi}{3}\right) \), which lies between \( \sin\left(\frac{\pi}{2}\right) = 1 \) and \( \sin(0) = 0 \).

### Estimation of \( \sin\left(\frac{\pi}{3}\right) \) using known values:

\[
\sin\left(\frac{\pi}{3}\right) = \sin 60^\circ
\]

Using a unit circle or sine values for common angles:

1. \( 0^\circ \) is \( 0 \) radians, and \( \sin(0) = 0 \).
2. \( 90^\circ \) is \( \frac{\pi}{2} \) radians, and \( \sin\left(\frac{\pi}{2}\right) = 1 \).
3. \( 180^\circ \) is \( \pi \) radians, and \( \sin(\pi) = 0 \).

The angle \( 60^\circ \) is in the first quadrant and corresponds to \( \frac{\pi}{3} \) radians.

### Calculation of \( \sin\left(\frac{\pi}{3}\right) \):

From trigonometric identities or commonly known angle values:

\[
\sin\left(\frac{\pi}{3}\right) = \sin 60^\circ = \frac{\sqrt{3}}{2}
\]

### Numerical Approximation:

\[
\sin\left(\frac{\pi}{3}\right) \approx \frac{\sqrt{3}}{2} \approx 0.866
\]

Thus, the estimated value of \( \sin\left(\frac{\pi}{3}\right) \) rounded to three decimal places is:

\[
\sin\left(\frac{\pi}{3}\right) \approx 0.866
\]

Would you like to see more details or have any questions about this solution?

### Relative Questions:

1. How do you derive the sine value for other common angles like \( 45^\circ \) or \( 30^\circ \)?
2. Can you explain how the unit circle helps in finding sine and cosine values?
3. What is the significance of using radians over degrees in trigonometric functions?
4. How can we use the sine function to calculate the area of a triangle?
5. What are the differences between the sine function's properties in the first and second quadrants?

### Tip:

To remember the sine values of commonly used angles (like \( 30^\circ, 45^\circ, \) and \( 60^\circ \)), note that they relate to simple fractions of square roots: \( \sin 30^\circ = \frac{1}{2} \), \( \sin 45^\circ = \frac{\sqrt{2}}{2} \), and \( \sin 60^\circ = \frac{\sqrt{3}}{2} \).

Learn how to estimate sin(pi/3) using known sine values like sin(0) = 0, sin(pi/2) = 1, and sin(pi) = 0. Explore the calculation steps and numerical approximation to find sin(pi/3) rounded to three decimal places.

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