Question: What is (2sin(a)cos(a))/(cos^(2)(a)- sin^(2)(a)) equal to?

What is (2sin(a)cos(a))/(cos^(2)(a)- sin^(2)(a)) equal to?

What is (2sin(a)cos(a))/(cos^(2)(a)- sin^(2)(a)) equal to?

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