Questions: Find the exact value. Do not use a calculator. cos(pi/6) sqrt(3) sqrt(2)/2 sqrt(3)/2 2 sqrt(3)/3

Find the exact value. Do not use a calculator.
cos(pi/6)
sqrt(3)
sqrt(2)/2
sqrt(3)/2
2 sqrt(3)/3
Transcript text: Find the exact value. Do not use a calculator. \[ \cos \frac{\pi}{6} \] $\sqrt{3}$ $\frac{\sqrt{2}}{2}$ $\frac{\sqrt{3}}{2}$ $\frac{2 \sqrt{3}}{3}$
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Solution

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Solution Steps

To find the exact value of \(\cos \frac{\pi}{6}\), we can use the unit circle or trigonometric identities. The angle \(\frac{\pi}{6}\) radians is equivalent to 30 degrees, and the cosine of 30 degrees is a well-known trigonometric value.

Step 1: Identify the Angle

We need to find the exact value of \( \cos \frac{\pi}{6} \). The angle \( \frac{\pi}{6} \) radians corresponds to 30 degrees.

Step 2: Use the Cosine Value

From trigonometric values, we know that: \[ \cos 30^\circ = \frac{\sqrt{3}}{2} \] Thus, we can conclude that: \[ \cos \frac{\pi}{6} = \frac{\sqrt{3}}{2} \]

Final Answer

The answer is \( \boxed{\frac{\sqrt{3}}{2}} \).

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