If m^3 is equal to cosec - sin and n^3 is equal to sec - cos then prove that m^4n^2 +m^2n^4 = 1

If m^3 is equal to cosec - sin and n^3 is equal to sec - cos then prov

1.	If m^3 is equal to cosec - sin and n^3 is equal to sec - cos then prove that m^4n^2 +m^2n^4 = 1
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