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The logic followed here is: The letter which is at the middle is changing to its 2nd succeeding letter as per the English Alphabetical series and in each figure the 1st letter and the 2nd letter swap their position, similarly the 4 th letter and the 5 th letter swap their position.
if cot x- tan x=7 then what is the value of cot x + tan x=?
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tan 4˚ × tan 43˚ × tan 47˚ × tan 86˚ = ?
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