Which of the following expressions can be written as a single sine function?

Question

Which of the following expressions can be written as a single sine function of the form Asin(Bt + θ)?

a.) 3sin(2t) + 5cos(2t)

b.) cos(πt)

c.) 2sin(3t)+3cos(2t)

d.) sin(2t)+tan(2t)

e.) cos(πt)−5sin(πt)

Answer 1

a), b), e) can be expressed as sine function of some argument