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Grade 12Differential Calculus

Find the sum of the question

Profile image of aakanksha
11 Years agoGrade 12
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2 Answers

Profile image of noogler
11 Years ago
where is the question???????????????
 
plz post ur question again :-)
Profile image of aakanksha
11 Years ago
the question is:
cos(thita)+ 22cos(2thita)+ 32cos(3thita)+..........+ n2cos(nthita) =