Can a cadence end with a secondary dominant?

Yes, it can end even before the last chord.

1. Does a secondary dominant have to resolve?
2. How do you resolve a secondary dominant?
3. What chords can be secondary dominant?
4. Is a secondary dominant chord always major?

Does a secondary dominant have to resolve?

The term secondary dominant (also applied dominant, artificial dominant, or borrowed dominant) refers to a major triad or dominant seventh chord built and set to resolve to a scale degree other than the tonic, with the dominant of the dominant (written as V/V or V of V) being the most frequently encountered.

How do you resolve a secondary dominant?

Writing Secondary Dominants

1. Find the the root of the chord after the secondary dominant (the Roman numeral under the slash). It is a major or minor triad.
2. Find the pitch a P5 above the root. ...
3. Build a dominant seventh chord or major triad on this pitch. ...
4. Resolve the chordal 7th (down) and the secondary leading-tone (up).

What chords can be secondary dominant?

A secondary dominant is any chord that has the dominant function over another chord that is not the tonic of the song. For example, in the key of C major, the dominant chord is G7.

Is a secondary dominant chord always major?

No, secondary dominants aren't required to be seventh chords. They can be plain triads (e.g. V/vi). They also aren't required to be major or have a major triad--I've heard plenty of vii°7/V chords, and those are diminished 7th chords.