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3.7.4 Integration (A-level only)

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Question 68

In aerodynamic testing, the drag coefficient CDC_DCD​ of a specialized wing profile is modeled using the following definite integral related to the airflow pressure distribution:

CD=∫2312(4−w2)32 dw C_D = \int_{\sqrt{2}}^{\sqrt{3}} \frac{12}{(4 - w^2)^{\frac{3}{2}}} \, dw CD​=∫2​3​​(4−w2)23​12​dw

By using the substitution w=2sin⁡θw = 2 \sin \thetaw=2sinθ, determine the exact value of CDC_DCD​.

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3.7.4 Integration (A-level only) Questions

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