1, Express x = 3sin3t + 5cos3t in the form of x=Rsin(3t + ø)
2, Express x = 2sin(0.5t + 3) + 3cos(0.5t + 1) in the form x = Rsin(0.5t + ø)
All working must be done in radians.
Sine and Cosine Addition Formulae
sin(A + B) = sinAcosB + cosAsinB
cos(A + B) = cosAcosB - sinAsinB
Can anyone help with this. Its driving me crazy!!