Find the minimum value of y = 2 cos x - 3.
Answer and explanation
Correct answer: D. -5
- Step 1: The least value of cos x is -1. Step 2. y = 2(-1) - 3 = -5. Answer: -5. Why not the others: -1: That is the value at the maximum of cosine, not the minimum. -3: That ignores the amplitude 2. -6: That multiplies the 3 by 2.
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