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Mam, actually the question I specified is in the exercise 7.3: Q.NO - 22 page.no 307 and this method of multiplying and dividing with sin(a-b) is also given in TOPPER NCERT solutions. I want to know the reason behind multiplying and dividing the integrand with sin(a-b) and also another method to to solve this problem as an alternative.. Please help me..
1.what were the failures of muhhamad tughluq, explain each faliures in almost 100-150 words.
2.who were the the rulers after khizr khan (sayyid dynasty)?
3.what were the achivements of allauddin khalji? why was he called a good -wisdomful ruler?
4.what is the difference between hinterlands and garrison town?
5.when and how did delhi became an important city?