I know that there are four factors that affect diffraction angle in youngs double slit experiment,
1) Wavelength
2) slit separation
3) fringe spacing
4) distance to the fringes
For very small angles tan and sine are approximately equal, so X(fringe separation)/L(distance)=landa/d (slit separation)
But sometimes questions like, "if you double the wavelength and half the slit separation what happens to the angle?" or "what happens to angle if slit separation is doubled and distance to fringes is halved" or "if wavelength increases and the fringe separation is halved, what happens to angle of diffraction" THROW ME OFF.
Please help me understand the relationship between them.