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If we know that the trigonometric identity for cosecant is then we can use substution to verify .
25 October 2011
the trig identity: cosec(x) =1/sin(x),
sin(x)* 1/sin(x) =1 (any value multiplied by its reciprocal = 1)
therefore, cosec(x) sin(x) =1
13 November 2020
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