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

Author

Alex Ratushnyak, Nov 11 2014

Keywords

• nonn

Comments

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

Examples

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

Crossrefs

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

Programs

Mathematica

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

Python

import math
for n in range(381): print(int(1000*math.sin(math.pi*n/180)), end=', ')

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).

Extensions

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