well a D major is going to be composed of the 1st, 3rd and 5th note of the d major scale, just like any major chord. An F# major is just the 1st, 3rd and 5th note of the F# major scale.
So a D major scale is D, E, F#, G#, A, B, C#, D right?
How do i know this, because a major scale is...