The question makes little sense: neither the key of F nor the key of C have any sharps. The key of F has one flat. Keys with sharps are: G, D, A, E, B, F#, an C#.
C sharp major, or A sharp minor. The sharps are F, C, G, D, A, E and B.C# Major does
A major, or F# minor
the order of sharps and flats are both used to write out the order in a key siganture on a piece of music (for example: the key of d has two sharps, f and c, so in the key signature, you see a sharp for f and a sharp for c) Also, when you're looking at the key signature, you can use the order to find out what key the song is in. For sharps, you look at the last sharp in the key signature, and go up one letter in the musical alphabet. if that note is not sharped, then that letter is the key. if it is sharped, then it's that letter, sharped (for example: key of c sharp, fcgdaeb are the sharps: you go up one from b and it's c, but c is already sharp, so it's the key of c sharp) For flats, you look at the second to last flat in the key signature, and that's the key that it's in. if there's only one flat, it's b flat, and the key is f. i hope this helped!!
Bbb Eb Ab Db Gb Cb Fb. Far from being strictly theoretical, the key F flat major becomes important when a composition in Cb major modulates to the Subdominant, the second most common modulation. The key-change may be indicated either through accidentals (double-flats placed beside notes), or through a change of key signature. While some composers might write a sonata in the key of Cb major, they might wish their second movement to be in the Subdominant key. They have the option of notating with a key signature of 8 flats (which shows the relation to the first movement), or using it's enharmonic equivalent, E major (key signature: 4 sharps), to simplify reading.
D major or it's relative minor (B minor). I memorized the "Circle of 5th's" to help me remember key signatures. There are many key signatures with F and C sharps. D, A, E, B, F#, C# and their relative minor scales (Bm, F#m, C#m, G#m, D#m, A#m).
B Major is the 1st major scale that CONTAINS A sharp and F sharp within its key signature but has a total of 5 sharps which are, F# C# G# D# A# F# Major also CONTAINS A sharp and F sharp within its key signature but has a total of 6 sharps which are, F# C# G# D# A# E# C# Major also CONTAINS A sharp and F sharp within its key signature but has a total of 7 sharps which are, F# C# G# D# A# E# B#
D major has a key signature of F sharp and C sharp D minor has a key signature of B flat
The key signature of D sharp major has nine sharps: F, C, G, D, A, E, B, and F.
A major has three sharps: F, C, and G.F sharp, C sharp, G sharp
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.
The key signature that includes the note E sharp is the key of F sharp major.
C sharp major, or A sharp minor. The sharps are F, C, G, D, A, E and B.C# Major does
Four key signatures have G sharp and E sharp in them: F sharp Major, D sharp minor, C sharp Major and A sharp minor.
Four sharps - F#, C#, G#, D# (the same as E major).
A major, or F# minor
The key that includes both F sharp and C sharp is the key of D major.
the order of sharps and flats are both used to write out the order in a key siganture on a piece of music (for example: the key of d has two sharps, f and c, so in the key signature, you see a sharp for f and a sharp for c) Also, when you're looking at the key signature, you can use the order to find out what key the song is in. For sharps, you look at the last sharp in the key signature, and go up one letter in the musical alphabet. if that note is not sharped, then that letter is the key. if it is sharped, then it's that letter, sharped (for example: key of c sharp, fcgdaeb are the sharps: you go up one from b and it's c, but c is already sharp, so it's the key of c sharp) For flats, you look at the second to last flat in the key signature, and that's the key that it's in. if there's only one flat, it's b flat, and the key is f. i hope this helped!!