Maths help - Period of a function?

Question

How can you find the period of the function sin 2x + cos 3x?

Answer 1

for sin(kx) or cos(kx)

the period is 2π/k

thus

the period of sin(2x) = π

the period of cos(3x) = 2π/3

the common multiple of these is .. . .

6π = period of the combined function

.. . .. .