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\(\cos (2 x+7)=a(2-\sin x)\) can have a real solution for
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Dec 10, 2021
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Sets, relations and functions
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Dec 26, 2021
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kritika
\(\cos (2 x+7)=a(2-\sin x)\) can have a real solution for
(A) all real values of a
(B) \(\mathrm{a} \in[2,6]\)
(C) \(\quad a \in[-\infty, 2] \backslash\{0\}\)
(D) \(\mathrm{a} \in(0, \infty)\)
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Dec 26, 2021
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Ans : (C) Hint : By sandwich theorem
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