The angle between a plane P and the xy-plane is , where 0 < /2.
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The angle between a plane P and the xy-plane is θ, where 0 ≤ θ < π/2. The projection of a rectangular region in P onto the xy-plane is a rectangle whose sides have lengths Δx and Δy, as shown in the figure. Prove that the area of the rectangular region in P is sec θ Δx Δy.
Transcribed Image Text:
Area: sec θ Δ.xΔy θ P ΔΕ Area in xy-plane: AxAy ΔΥ
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