Find the Value Using the Unit Circle cos(30 degrees )

Problem

cos(30)

Solution

1. Identify the angle on the unit circle. The angle 30 is located in the first quadrant.

2. Determine the coordinates (x,y) for the angle 30 on the unit circle.

3. Recall that for any angle θ on the unit circle, cos(θ) corresponds to the xcoordinate.

4. Extract the xcoordinate from the point (√(,3)/2,1/2)

Final Answer

cos(30)=√(,3)/2

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