atan

atan(boleng)

atan accepts any number — it has no limits like asin and acos.

By default the result lies between -SEPHATLO_PI and SEPHATLO_PI (about -1.57 to 1.57); in degrees, between -90 and 90.

Most of the time atan2 is the one you want. atan takes a single number — a slope — and one slope can come from two different directions: y / x is the same for (3, 4) and for (-3, -4). atan cannot tell them apart; atan2(y, x) can, because it sees both numbers themselves.

The name is left as it stands — see sin.

Parameters

Name	Type	Description
boleng	palo	Any number — usually a slope, y / x.

Examples

A changing slope turning a line

Rerun ↻Open in editor ↗

tiro setaLoeto() {
  thalaKanefase(400, 400);
  bokamorago(243);
  boketeMothalo(3);

  seeloSaSekhutlo(DEGREES);

  gopheta (diri i = 0; i < 16; i = i + 1) {
    metlha serepodi = lekanyetsa(i, 0, 15, -6, 6);

    // atan e fetolela serepodi go nna sekhutlo
    metlha sekhutlo = atan(serepodi);

    mothaloMmala(lekanyetsa(sekhutlo, -90, 90, 60, 240), 140, 200);
    thalaMothalo(200, 200, 200 + cos(sekhutlo) * 150, 200 + sin(sekhutlo) * 150);
  }
}

See also

atan2, tan, asin, acos, seeloSaSekhutlo