Question

A support beam, within an industrial building, is subjected to vibrations along its length; emanating from
two machines situated at opposite ends of the beam. The displacement caused by the vibrations can be
modelled by the equation 𝑓(𝑥) = 3𝑠𝑖𝑛 (2𝑥 +𝜋3). Use the compound angle formulae to expand f(x) as a sum
of sine and cosine

Answer 1

Just use the formula
sin(a+b) = sina cosb + cosa sinb

Answer 2

You know if I honestly knew... I would not come here for any help.
You are never to no good use, and always hint to something and never assist. But thanks for your time.