without+symmetry
131List of trigonometric identities — Cosines and sines around the unit circle …
132Guitar tunings — Guitar standard tuning, shown one octave higher than actual pitch. (E2.A2.D3.G3.B3.e4) Guitar tunings almost always refers to the pitch of the open ( unfretted ) string, though some tunings may only realistically be attained by the use of a capo… …
