Evaluate cos(30 degrees )

Problem

cos(30)

Solution

1. Identify the angle in the context of the unit circle or a special right triangle.

2. Recall the properties of a 30−60−90 triangle, where the side lengths are in the ratio 1:√(,3):2

3. Apply the definition of the cosine function, which is the ratio of the adjacent side to the hypotenuse.

4. Determine the value based on the ratio √(,3)/2

Final Answer

cos(30)=√(,3)/2

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