The Mach Number M of an Airplane Is the Ratio

question 51

Multiple Choice

The mach number M of an airplane is the ratio of its speed to the speed of sound.When an airplane travels faster than the speed of sound, the sound waves form a cone behind the airplane (see figure) .The mach number is related to the apex angle θ of the cone by . ​ ​
Rewrite the equation in terms of θ.
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• A)​
• B)​
• C)​
• D)​

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