Question

What is the period of `f(theta)= sin 4 t - cos 5 t`?

Answer 1

`2pi`

Explanation:

Period of sin (4t) --> `(2pi)/4 = pi/2`
Period of cos (5t) ---> `(2pi)/5`
Least common multiple of `pi/2 and (2pi)/5 --> 2pi`
Period of f(t) --> `2pi`