Q.
Let α be a solution of the equation 2[x+32]=3[x−64] where [x] is the greatest integer less than or equal to x and let β=r=1∏9sin(182r−1)π, then
603
115
Relations and Functions - Part 2
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Solution:
We have 2[x]+64=3[x]−192⇒[x]=256⇒x∈[256,257)
Also, β=sin18π⋅sin183π……sin189π……sin1817π =sin218π⋅sin2183π⋅sin2185π⋅sin2187π=sin210∘⋅sin230∘⋅sin250∘⋅sin270∘ 41(sin10∘⋅sin50∘⋅sin70)2=41(4sin30∘)2 ∴β=41(81)2=2561