Tan²A -Sin²A = Tan²A × Sin²A
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Taking L.H.S,
= Tan²A - Sin²A
= Sin²A/Cos²A - Sin²A
= Sin²A-Cos²A.Sin²A/Cos²A
= Sin²A( 1-Cos²A)/Cos²A
= Sin²A × Sin²A/Cos²A
= Sin²A × Tan²A
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