The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A197002 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A197002

Decimal expansion of xo, where P=(xo,yo) is the point nearest O=(0,0) in which a line y=mx meets the curve y=cos(x+Pi/4) orthogonally.
(history; published version)

#17 by Alois P. Heinz at Tue Feb 20 08:35:32 EST 2024

STATUS

editing

approved

#16 by Alois P. Heinz at Tue Feb 20 08:35:29 EST 2024

MAPLE

evalf(solve(cos(x)=x, x)/2, 140); # Alois P. Heinz, Feb 20 2024

STATUS

approved

editing

#15 by Amiram Eldar at Wed Jun 16 06:58:16 EDT 2021

STATUS

reviewed

approved

#14 by Michel Marcus at Wed Jun 16 05:12:30 EDT 2021

STATUS

proposed

reviewed

#13 by Gleb Koloskov at Wed Jun 16 02:03:03 EDT 2021

STATUS

editing

proposed

#12 by Gleb Koloskov at Wed Jun 16 01:51:46 EDT 2021

FORMULA

Equals d/2 = A003957/2, where d is the Dottie number. - Gleb Koloskov, Jun 16 2021

PROG

(PARI) solve(x=0, 1, cos(x)-x)/2 \\ Gleb Koloskov, Jun 16 2021

CROSSREFS

Cf. A197003, A196996, A197000, A003957.

STATUS

approved

editing

#11 by Joerg Arndt at Sat Apr 10 02:04:56 EDT 2021

STATUS

proposed

approved

#10 by Jon E. Schoenfield at Sat Apr 10 00:16:04 EDT 2021

STATUS

editing

proposed

#9 by Jon E. Schoenfield at Sat Apr 10 00:16:02 EDT 2021

NAME

Decimal expansion of xo, where P=(xo,yo) is the point nearest O=(0,0) in which a line y=mx meets the curve y=cos(x+piPi/4) orthogonally.

STATUS

approved

editing

#8 by Russ Cox at Fri Mar 30 18:57:50 EDT 2012

AUTHOR

_Clark Kimberling (ck6(AT)evansville.edu), _, Oct 09 2011

Discussion

Fri Mar 30

18:57

OEIS Server: https://oeis.org/edit/global/285