Question: In analyzing light reflection from a cylinder onto a flat surface, the expression 3cos cos3 arises. Show that this equals 2cos cos2 + 4sin

In analyzing light reflection from a cylinder onto a flat surface, the expression 3cosθ − cos3θ arises. Show that this equals 2cosθ cos2θ + 4sinθ sin2θ.

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We can use trigonometric identities to rewrite 3cos cos3 as 2cos cos2 4sin sin2 H... View full answer

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