If the range of the function
\( f(x)=\frac{1}{3 \sin x-4 \cos x+2} \) is \( (-\infty, b] \cup[c,.... VIDEO
If the range of the function
\( \mathrm{P} \)
\( f(x)=\frac{1}{3 \sin x-4 \cos x+2} \) is \( (-\infty, b] \cup[c, \infty) \), then
W
the value of \( \frac{1}{b}+\frac{1}{c} \) is equal to
(1) 10
(2) 4
(3) \( -\frac{4}{21} \)
(4) \( \frac{4}{21} \)
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