can you confirm or deny if i am correct in my working for this question

a complex waveform comprises a fundamental sinusodial voltage which has a peak value of 36V and a frequency of 400Hz together with a third harmonic component having a peak value of 12V leading the fundamental by 90 degress. Write down an expression for the instantaneous value of the complex voltage and use it to determine the value of the voltage at 3 ms from the strat of the cyle.

v=36sin400 + 12sin1200 + 90

v=23.14 + 100.39

v= 123.53V

v0.003=0.37V

thank you for your help