IJU 20. The number of real roots of...
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IJU 20. The number of real roots of sin (2* )cos (2*) ==(2* + 2 *) is 2) 2 | 1)1 3 )3 4) No solution linh 2+ika - 1)x+5=0

JEE/Engineering Exams
Maths
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minvalu of ( 2^{x}+2^{-x} ) ( A_{m} quad A M geq 4 M quad R_{Q} ) ( frac{2^{x}+2^{-x}}{2} geq 1 sqrt{2^{x} times 2^{-x}} ) ( frac{1}{4}left(2^{x}+2^{-x}right) geq frac{1}{2} ) ( therefore ) min value of ( R+1 S=1 / 2 ) at ( x=0 ) only Max value of ( sin 2^{x} cos 2^{x} ) ( frac{2}{2} sin ^{-1} 2 cos 2^{x}=frac{1}{2} sin left(2^{x+1}right) ) ( therefore quad max quad ) valus of ( sin 2^{x} cos 2^{x}=frac{1}{2} ) at ( 2^{x+1}=pi / 2 ) ( therefore ) no solution
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