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Trigonometrical Equations
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સમીકરણ $sin\,\, 2x + cos\,\, 4x = 2$ ના ઉકેલોની સંખ્યા મેળવો
A
$0$
B
$1$
C
$2$
D
અનંત
Solution
$\sin 2 x+\cos 4 x=2$
$\Rightarrow \quad \sin 2 x=1, \cos 4 x=1$
$\Rightarrow \quad 1-2 \sin ^{2} 2 x=1$
$\Rightarrow \quad 1-2=1$ which is absurd
Hence there is no solution.
Standard 11
Mathematics