E-sharp.
One sharp could be G major or E minor.
The circle of fifths is a way of figuring out how many sharps/flats a key. Starting with C major, you go up a fifth and put a sharp on the seventh degree of the scale, which is F sharp - so the key of G major has one sharp. This can be done by going up a fifth from G to D, in D major the F sharp (third degree) is already present and again you add a sharp to the seventh note, C-sharp, thus D major has two sharps. This goes all the way round to C-sharp major, with all notes made sharp. You go down a fifth from C major to F major and lower the fourth degree, making the B a B flat, this F major has one flat. Again by going down a fifth from F is B flat and the fourth note is lowered so you lower the E to E flat, so B flat major has two flats. You keep going until you reach the key of C flat major, with all notes in the scale flat.
The key of E minor has one sharp: F sharp. It is the relative minor of G Major.
There are a total of fifteen keys in Western music. Keys come with two forms, sharp keys and flat keys and one comes with all naturals. The complete list of major keys are shown below: C major (or A minor) - no sharps/flats G major (E minor) - 1 sharp D major (B minor) - 2 sharps A major (F-sharp minor) - 3 sharps E major (C-sharp minor) - 4 sharps B major (G-sharp minor) - 5 sharps F-sharp major (D-sharp minor) - 6 sharps C-sharp major (A-sharp minor) - 7 sharps F major (D minor) - 1 flat B-flat major (G minor) - 2 flats E-flat major (C minor) - 3 flats A-flat major (F minor) - 4 flats D-flat major (B-flat minor) - 5 flats G-flat major (E-flat minor) - 6 flats C-flat major (A-flat minor) -7 flats There you go, those are all the different keys you can write in!
G major, D major, E major, B major, F sharp major, F sharp minor, A sharp major, etc.
F sharp.
what is the relative minor of f sharp major
The key of Gmajor has 1 sharp which is F sharp.
The key of G Major has one sharp: F#
There are six sharps in F sharp major.
f sharp
The mediant of any major scale is the note that is a third above the tonic (root) of the scale. In the key of F sharp major, the tonic is F sharp, so the mediant would be A sharp.
That would be either A major or F# minor.
F# major. f sharp, c sharp, g sharp, d sharp, a sharp, e sharp
A major, or F# minor
The key with three sharps is A major, however A major uses C sharp - alongside with G sharp and F sharp - instead of D sharp.