The difference between pillars (essential parts) and obligatory parts of prayer

He was traveling but he forgot and stood up for a third rak’ah

The imam did the prostration of recitation and the person praying behind him did not realize, so he bowed

Should one who joined the prayer late repeat the prostration of forgetfulness if he did it with the imam?

The imaam forgot and stood up for a third rak’ah in Salaat al-Taraaweeh,then he sat down

If the imam stands up for an extra rak’ah, what should the one who is praying behind him do?

Should he do the prostration of forgetfulness after doing the part of the prayer that he has to make up?

If he does the prostration of forgetfulness after the salaam, should he recite the tashahhud and say salaam again?

When to Offer Sujud As-Sahw

When to Offer Sujud As-Sahw If You Are Following an Imam