Now begins the Chapter on True Motion.

The planet, diminished by its own high point apogee or aphelion, is the anomaly. The arc resulting from the upward and downward movement is the "arm" bhujā: the sine of the anomaly.

The positive or negative nature of the "upright" koṭi: the cosine of the anomaly follows the quadrants in the order of positive, negative, negative, and positive. ॥ 1 ॥

Now he describes the calculation of true positions: "The planet," etc. Subtracting the planet's own slow high point mandocca from the mean planet, the remainder is known as the anomaly kendra. Likewise, subtracting the planet's fast high point śīghrocca from the mean planet (after it has been corrected by the result of the slow "arm") also results in what is known as the anomaly. The "arm" arising from the upward and downward path is positive or negative. In that anomaly, the "arm" on the upward path is positive. The "arm" on the downward path is negative. This means that when the anomaly is in the six signs starting with Libra, the "arm" is positive; when in the six signs starting with Aries, it is negative. The "upright" is positive, negative, or positive according to the quadrants. This means in the anomaly, the "upright" in the first quadrant is positive, in the second quadrant it is negative, in the third quadrant it is negative, and in the fourth quadrant it is positive. In this way, the determination of positive and negative for the "arm" and "upright" should be understood everywhere. ॥ 1 ॥

In an odd quadrant, the "arm" and "upright" are derived from the traversed and remaining portions; in an even quadrant, it is the reverse.

The minutes and degrees of the "arm" and "upright" are found by multiplying the signs by four, three, and one respectively and summing them. ॥ 2 ॥

Now he explains the division of those "arms" and "uprights" and the calculation of the sines: "In an odd," etc. In an odd quadrant the 1st and 3rd, the signs etc. already traversed constitute the "arm." In that same quadrant, the signs etc. remaining to be traversed constitute the "upright." "In an even, it is the reverse"—meaning in an even quadrant the 2nd and 4th, the traversed portion is the "upright" and the remaining portion is the "arm." This division of "arm" and "upright" is to be observed everywhere.

"Four," etc. Having brought forth the signs etc. of the "arm" and "upright" by the aforementioned method, one should set them down separately. Then, multiply the first sign of the "arm" by four, the second sign by three, and the third sign by one, and sum them together. When the "arm" consists of two signs and some degrees and minutes, then multiply the first sign by four, the second by three, and multiply the degrees and minutes by two; then, having converted the minutes into degrees by dividing by sixty and adding them to the degree place, and similarly converting the degrees... The text breaks off mid-instruction regarding the conversion of units

1. Variant: ...in the calculation of the village.

2. Variant: Thus.

3. Variant: ...from the degrees and minutes.

4. Variant: ...from the degrees and minutes.