1. The problem statement, all variables and given/known data Express the following as R sin (wt + alpha). Find R and alpha. This is lead phase. 2. Relevant equations n/a 3. The attempt at a solution n/a I need to do same thing for cosine as well but the second part of problem asks you... Lag phase instead of lead phase using cosine instead of sine...Also explain with words and sketches what lead and lag phase angles refer to. This is an engineering course but it seems really simple. I tried to google, textbook, and etc. to find what this lead phase, lag phase, lead phase angle, and lag phase angle. I am trying to finish most of my homework for upcoming week and this is driving me nuts! Thank you!