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Andreas93 [3]
3 years ago
12

The value 5pi/24 is a solution for the equation 4 cos^2 (4x)-3=0. True or false

Mathematics
1 answer:
Margaret [11]3 years ago
5 0

Let's check.

x = 5π/24

4x = 5π/6

cos 4x = cos(5π/6) = cos 150° = -√3/2

cos² 4x = (-√3/2)^2 = 3/4

4 cos² 4x  -3  = 4 (3/4) - 3 = 0

Answer: TRUE

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8 0
3 years ago
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Julli [10]

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Step-by-step explanation:

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The problem statement tells you that t represents minutes after lift off, so this solution means the altitude is 21000 feet 6 minutes after lift off.

The question is asking for the number of minutes after lift off that the plane reaches an altitude of 21000 feet, so this answers the question directly:

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4 0
2 years ago
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As I've shown on picture that I attached:
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