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What is the frequency of #f(theta)= sin 24 t - cos 21 t #?

1 Answer

Aug 9, 2016

#2pi#

Explanation:

Period of sin (24t) --> #(2pi)/24 = pi/12#
Period of cos (21t) --> #(2pi)/21#
Least common multiple of #pi/12 and (2pi)/21#

#pi/12# ...x (24) ...--> #2pi#
#(2pi)/21# ....x (21)...--> #2pi#

Period of f(t) --> #2pi#

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