Answer:1/2
Step-by-step explanation: The unit circle or the unique right triangle can be used to represent the cosine of 60 degrees as a fraction. Using the unit circle, we can determine that the x-coordinate of the point on the unit circle that forms a 60-degree angle with the positive x-axis is equal to the cosine of that angle. The cosine of 60 degrees is 1/2 at this point, which has coordinates (1/2, sqrt (3)/2).
The unique right triangle with angles of 30, 60, and 90 degrees is an alternative. The length of the side in this triangle opposite the 60-degree angle is equal to the hypotenuse divided by two. Since the triangle is a unit triangle, the length of the opposite side is equal to the length of the hypotenuse, which is 1 sqrt(3)/2. The side that is next to the 60-degree angle and on which we are also focused in order to calculate cosine has a length of 1/2. As a result, 1/2 is also the cosine of 60 degrees.
Therefore, cos60 has a simple value of 1/2 as a fraction.