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Correcting LEO orbit inclination choices
First perform a Hohmann transfer to transfer from the inclined LEO orbit to an inclined GEO orbit, and then apply all of the plane inclination correction at the apogee of the Hohmann elliptical orbit where the ellipse speed will be smallest. This is less costly in ΔV than the above sequence, and is a common maneuver.
Apply a small and partial plane inclination correction (say an angle α) at the perigee of the Hohmann orbit, then apply the remaining inclination correction (angle β-α) at the apogee. Notice that for α=0, this case becomes the same as case (2) above.
Performing needed calculation of ΔV using the above 3 options showed that the third option above is the best (least ΔV) . α=1.288 and β=13.7
Correct all of the plane inclination before performing a Hohmann transfer from LEO to GEO. In other words, all of the inclination correction is made at the perigee of the Hohmann ellipse where the Hohmann transfer speed is largest. This will turn out to be the most fuel costly maneuver.
Notes: