# Chapter 11, Lissajous' Figures¶

## Example 1, page 448¶

In :
# Frequencies
#given data :
t=2.0 # in sec
n1=100.0 # in vibrations/sec
n2a=n1+(1/t)
n2b=n1-(1/t)
print "Frequency, n2a = %0.2f " %n2a
print "frequency, n2b = %0.2f "%n2b

Frequency, n2a = 100.50
frequency, n2b = 99.50


## Example 2, page 448¶

In :
from __future__ import division
# Frequencies
#given data :
t1=15 # in sec
t2=10 # in sec
n2=400 # in vibrations/sec
n1a=n2+(1/t1)
n1b=n2-(1/t1)
print "Frequency, n1a = %0.2f Hz " %n1a
print "Frequency, n1b = %0.2f Hz " %n1b
n_1a=n2+(1/t2)
n_1b=n2-(1/t2)
print "Frequency, n_1a = %0.2f Hz " %n_1a
print "Frequency, n_1b = %0.2f Hz " %n_1b

Frequency, n1a = 400.07 Hz
Frequency, n1b = 399.93 Hz
Frequency, n_1a = 400.10 Hz
Frequency, n_1b = 399.90 Hz


## Example 3, page 449¶

In :
# Frequencies
#given data :
t1=15 # in sec
t2=10 # in sec
n2=256 # in vibrations/sec
n1a=(2*n2)+(1/t1)
n1b=(2*n2)-(1/t1)
print "Frequency, n1a = %0.2f Hz " %n1a
print "Frequency, n1b = %0.2f Hz " %n1b
n_1a=(2*n2)+(1/t2)
n_1b=(2*n2)-(1/t2)
print "Frequency, n_1a = %0.2f Hz " %n_1a
print "Frequency, n_1b = %0.2f Hz " %n_1b

Frequency, n1a = 512.07 Hz
Frequency, n1b = 511.93 Hz
Frequency, n_1a = 512.10 Hz
Frequency, n_1b = 511.90 Hz