(Steps Shown) In finding the lift of the air flowing around an airplane wing, we use the integral ∫_-π /2^π /2theta ^2 cos θ dθ . Evaluate
Question: In finding the lift of the air flowing around an airplane wing, we use the integral \(\int_{-\pi /2}^{\pi /2}{{{\theta }^{2}}\cos \theta \,d\theta }\). Evaluate this integral.
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