This is similar to problem 7.21 in "Circuit Analysis and Design" by Ulaby, Maharbiz, and Furse. This is a free/open educational textbook on basic circuit design found here: https://cad.eecs.umich.edu/
Several examples of converting a sinusoid into a phasor. This is a typical method for dealing with phasors in engineering circuits.
On this page of the site you can watch the video online Transform to Phasor Example Problems with a duration of hours minute second in good quality, which was uploaded by the user Dr. Chrysler's Engineering Education Channel 16 March 2023, share the link with friends and acquaintances, this video has already been watched 1,492 times on youtube and it was liked by 8 viewers. Enjoy your viewing!