Question: Point out how it follows from expressions (15) and (16) in Sec. 34 for |sin z|2 and |cos z|2 that (a) |sin z| |sin

Point out how it follows from expressions (15) and (16) in Sec. 34 for |sin z|2 and |cos z|2 that
(a) |sin z| ≥ |sin x|;
(b) |cos z| ≥ |cos x|.

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