The minimum value of 3sinx + 3cosx is
Explanation:
f(x) = 3sinx + 3cos x
Using the inequality, AM ≥ GM
f(x) will have a minimum
where 3 sin x = 3 cos x
∴ sin x = cos x
∴ sin x = cos x = -12
f(x)min = 3-12 + 3-12
= 23-12
Hence, option (b).
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