NIMCET 2022 Question Paper with solutions

Question : 7 of 120

Marks: +1, -0

{\a}_1, {\a}_2 . . . . . . {\a}_{ {\n}}

be Arithmetic Progression with common difference then

{\d}

, then the sum

\sin d({\cosec}{a}_1 {\cosec a_{2}}+{\cosec a_2} {\cosec a}_3+. . . . .+{\cosec a_{n-1}} {\coseca} a_n)

is equal to

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