perplexus.info :: Just Math : Trigo inequality

Trigo inequality (Posted on 2014-12-11)

Let c be the Champernowne's constant, or c=0.123456789101112131415161718192021....

Show, without calculator aid, that
sin(c) + cos(c) + tan(c) > 10c

No Solution Yet Submitted by Danish Ahmed Khan

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