A249988 Integer part of sine of n degrees multiplied by 1000.

0, 17, 34, 52, 69, 87, 104, 121, 139, 156, 173, 190, 207, 224, 241, 258, 275, 292, 309, 325, 342, 358, 374, 390, 406, 422, 438, 453, 469, 484, 500, 515, 529, 544, 559, 573, 587, 601, 615, 629, 642, 656, 669, 681, 694, 707, 719, 731, 743, 754, 766, 777, 788, 798, 809, 819, 829, 838, 848, 857, 866

Offset

0,2

Comments

Due to multiplication by 1000 almost all a(n) are different for n<90, the only exception is a(89)=a(88)=999.

Links

Table of n, a(n) for n=0..60.

Formula

a(n) = round(1000*sin(pi*n/180)), where round() is the rounding towards zero function.

a(360+n) = a(n).

a(180+n) = -a(n).

Example

sin(pi/2) = sin(90 deg.) = 1, so a(90)=1000.

Mathematica

Table[IntegerPart[1000*Sin[n Degree]], {n, 0, 60}] (* Harvey P. Dale, May 22 2015 *)

Prog

(Python)
import math
for n in range(381): print str(int(math.trunc(1000*math.sin(math.pi*n/180))))+', ',

Crossrefs

Cf. A000493, A000494, A000484, A000480, A249989.

Sequence in context: A070814 A188290 A268287 * A098365 A033899 A110287

Adjacent sequences: A249985 A249986 A249987 * A249989 A249990 A249991

Keyword

nonn

Author

Alex Ratushnyak, Nov 11 2014

Extensions

Corrected and extended by Harvey P. Dale, May 22 2015

Status

approved