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Let the set of all a in R such that the ...

Let the set of all `a in R` such that the equation `cos2x+a sin x=2a-7` has a solution be `[p,q]` and `r=tan9^(@)-tan27^(@)-(1)/(cot63^(@))+tan81^(@)` ,then `pqr` is equal to

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JEE MAINS PREVIOUS YEAR-JEE MAIN 2024 ACTUAL PAPER-Question
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