Using LINEST for trig functions

Hi, please forgive I am a little bit of a newcommer to using LINEST in excel but I have now mastered using it to do a x3 polynomial regressession fit and that works fine.

The trouble is the data I want to fit is really sinusoidal and I would like a sine function fit. I have seen some references that seem to say this is possible to do in LINEST but I do not see how to code the function instruction.

What I want to fit is something like y= a sin(bx) + c

Could anybody confirm that this is possible to do with LINEST and help me with how I code the function command.

Many thanks