Which of the following components allows resolvers to combine vectors?

The correct option pertains to the resolver, which is an electromechanical device that converts the angular position of a rotating element into an electrical signal. Its primary function is to combine the inputs given in the form of vectors and output them as a sine and cosine signal. This capability is essential in various applications such as motion control, robotics, and aerospace systems, where precise angular measurements and control of rotation are necessary.

The resolver achieves this by providing an output that directly correlates with the angular position of the rotor, allowing for the combination of vectors represented by these angles. Unlike other components mentioned, the resolver is specifically designed for the purpose of combining and converting angular position data, making it essential for applications where vector integration is required. This functionality is vital for accurate positioning and control in various technological fields.