cetti H 0534 | V ~2053X @ Rasim co'...
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cetti H 0534 | V ~2053X @ Rasim co's 33 - Vio

JEE/Engineering Exams
Maths
Solution
111
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( begin{aligned} sin ^{-1} cos frac{33 pi}{5} &=sin ^{-1} cos left(6 pi+frac{3 pi}{5}right) &=sin ^{-1} cos frac{3 pi}{5} &=sin ^{-1} sin left(frac{pi}{2}+frac{pi}{10}right) sin ^{-1} sin left(frac{-pi}{10}right) &=pi / 10 text { lroved. } end{aligned} )
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