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)
Ram prasath
thanks. but how the sin (π/2 - O) came?
send me the whole deriavtion again so that I can clear your doubt.
here it is