The minimum value of \( 27^{\cos x}+81^{\sin x} \) is
(a) \( \frac{1}{3 \sqrt{3}} \)
(b) \( \fra...
The minimum value of \( 27^{\cos x}+81^{\sin x} \) is
(a) \( \frac{1}{3 \sqrt{3}} \)
(b) \( \frac{2}{3 \sqrt{3}} \)
(c) \( \frac{1}{9 \sqrt{3}} \)
(d) \( \frac{2}{9 \sqrt{3}} \)
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