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$The minimum value of 27^{\cos x} + 81^{\sin x} is equal to$

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Correct option is C

We have 27cos⁡x+81sin⁡x=33cos⁡x+34sin⁡x≥2⋅33cos⁡x⋅34sin⁡x=2.312(3cos⁡x+4sin⁡x)≥2.3-5/2=293

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The minimum value of 27cos⁡x+81sin⁡x is equal to

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$The minimum value of 27^{\cos x} + 81^{\sin x} is equal to$