Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
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Abhishek singh
There are many ways of doing this question. you can do it by Beta function or by changing the coordinates to cylindrical coordinates. but I have attached the simplest way to solve this question at JAM level. it is based on substitution method. Best regards.
how did u integrated the last part....sin^6xcos^6x