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vardaan kumar Grade: 11
        

THE LEAST +VE INTEGRAL VALUE OF n for which


1/sin45sin46 +1/sin47sin48+..........1/sin133sin134 =1/sinn holds is?

7 years ago

Answers : (1)

Ramesh V
70 Points
										

it had a really short method to solve this -



use    


and  cot A = - cot (180 - A) and simplify...


 


The answer is n = 1.


--


regards


Ramesh

7 years ago
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