16co ရှိ လ 16 COS COS လ လ ရှိ၊ n
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16co ရှိ လ 16 COS COS လ လ ရှိ၊ n

JEE/Engineering Exams
Maths
Solution
112
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( =-frac{1 cdot cos 72^{circ}}{cos 72^{circ}}=-1 . operatorname{Prin}_{2} alpha )
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