Planets become Yogakarakas if they are in mutual angles identical with own signs, exaltation, or friendly sign.
In the 10th house, a planet will be significantly so. Planets simply (i.e., not being friendly & co-workers) in the ascendant, the 4th and 7th do not become such Yogakarakas.
Even if they be placed in other houses but with such dignities as mentioned shall become Yogakarakas.
With such planets, even a person of mean birth will become king and be affluent. One born of royal scion then surely will become a king. Thus the effects be declared considering the number of such planets and the order the native belongs to.
Rule-1:
If two planets are in mutual angles from the ascendant and be with dignities like exaltation own sign or friendly sign, they act on behalf of each other and are known as “Paraspara Karakas” or co-workers. If one of the occupants is in the 10th house, the effects will still be pronounced. This is to be considered from the Moon.
In the above chart-1 (above) Saturn and the the Sun are in mutual angles from the ascendant and in their own signs. Hence they will act as co-workers causing away mutual enmity. And Saturn although a dire malefic for Scorpio ascendant will become a Yogakaraka by virtue of mutual angularity with the Sun having fulfilled dignity requirements.
Rule-2: Even though the condition of mutual angularity is fulfilled, if the two planets do not enjoy one of the three dignities required, then there is no correlationship between them.
In chart-2 (above), Mars and the Sun are in mutual angles from the ascendant but do not possess any dignity like exaltation or own house but are debilitated. Hence they will not act as Yoga giving planets.
Rule-3: If two planets are mutually angular, both being endowed with dignities like exaltation, own sign or friendly sign they will become coworkers although not placed in angles from the ascendant.
In chart-3 (above), both Jupiter and Saturn are not angular from the ascendant but are invested with exaltation positions. Hence both the planets will mutually represent and become favourable in their Dasa periods.
It is specifically stated that the 10th house position for one of the planets in the circumstance becomes exceedingly favourable.
In the example chart 1, the Sun is in the l0th with Paraspara Yogakaraka qualification in opposition to Saturn. Hence the Sun will exceedingly reveal beneficial results. Devoid of Saturn or any other co-worker, the Sun in the 10th will not be that powerful.
In other words, by virtue of coworkership, the Sun’s role gets immeasurably fortified.