@ shreya
yes , u can refer to the manual for extra information , but if you are running in short of time , then dnt follow that .
the main thing is ncert , the whole data they have illustrated in a very clear manner and just reading ncert will clear 40 percent of your doubt , and rest of the doubt u can refer to any of the 1 standard ref books otherwise go with your coaching material , else askiitians also avaliable for your rescue . u can take the self study package chapterwise also .
ALL THE BEST ..