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/usr/lib/pd/extra/cyclone/tanx~-help.pd is in pd-cyclone 0.1~alpha55-3.

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#N canvas 1260 275 593 376 10;
#X declare -lib cyclone;
#X msg 124 135 range -10 10;
#X obj 22 89 *~ 6.28319;
#X obj 22 64 phasor~ 2;
#X text 15 35 tan(x) for signals;
#X text 101 65 this is a real tangent function whose input expects
values between 0 and 2pi (similar to cosx~ and sinx~);
#X text 15 305 output values are asymptotic to inf/-inf when input
values approach -pi/2 and pi/2;
#X obj 22 161 Scope~ 130 130 256 3 128 -10 10 0 0 0 0 102 255 51 135
135 135 0;
#X obj 477 50 import cyclone;
#X obj 22 122 tanx~;
#X connect 0 0 6 0;
#X connect 1 0 8 0;
#X connect 2 0 1 0;
#X connect 8 0 6 0;