Question: 2 . 1 Show that the expression ( 1 - c o s 2 x ) ( 1 + c o s 2 x )

2.1 Show that the expression (1-cos2x)(1+cos2x)cos2xis equivalent tosin2x+sec2x-1.
2 . 1 Show that the expression ( 1 - c o s 2 x )

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