Sum

\math{\frac{1}{sin45sin46}+\frac{1}{sin47sin48}+...\frac{1}{sin133sin134}}}=\frac{1}{sinN}.

find minimum natural N.

6 Answers

is it ur doubt ?

hint :

multiply and divide by sin1 throughout

$\frac{\sin1}{\sin45.\sin46}=\cot45-\cot 46$

similarly spilt others

@rajat

y u always post answer also take pains to post solution

answer is 1

just use cot Î¸ + cot Ï€-Î¸ =0

Yes.

No it's not a dbt. This sum was solved in goiit long back..

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