A-4. If 0°
Question
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A-4. If 0°
JEE/Engineering Exams
Maths
Solution
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( cos x=frac{3}{sqrt{10}} ) ( log _{10} sin x+log _{10} cos x+log _{10} tan x ) ( =log _{10}(sin x cos x cdot tan x) ) ( =log _{10}left(sin ^{2} xright)=log _{10}left(1-cos ^{2} xright) ) ( =log _{10}left(1-frac{9}{10}right)=log _{10}left(frac{1}{10}right) ) ( =-log _{10} 10 ) ( =-1 ) ofrien ( (C) )

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