Answers

2014-03-17T12:45:38+05:30
Here α =π|2 and there fore sinα+cosec nα = 1+cosecnπ|2 , the value depends on  n
if n is even the value is nt defined if n is odd  i e n=(2m+1)π|2 here if m is even answer is 2  if m is odd answer is 0
 

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