What is the minimum value of 6 - 4 sin θ, 0 ≤ θ ≤ \(\frac{\pi}{2}\)

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CDS Elementary Mathematics 16 April 2023 Official Paper
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Answer (Detailed Solution Below)

Option 2 : 2
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Detailed Solution

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Concept:

-1 ≤ sin θ ≤ 1 When θ ∈ [0, π/2]

Calculation:

f(θ) = 6- 4 sin θ 

To make it minimum, (4 sinθ) should be maximum.

Since, θ ∈ [0 ,π/2]

Maximum value of sin θ = 1 

f(θ)min = 6 - 4 × 1 = 2

∴ Minimum value of 6- 4 sin θ is 2.

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