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acosr-sin tan x>-1 Simplify tan bco...
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acosr-sin tan x>-1 Simplify tan bcos x +asin x)
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Replace ( x ) uilin ( frac{a}{b} ) zy ( =tan ^{-1} frac{a}{b}-tan ^{-1}(tan x) ) ( =tan ^{-1} frac{a}{b}-x )
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