Prove that(Tan^2A-tan^2B)=(sin^2A-sin^2B)upon (cos^A*cos^2B)=(cos^2B-cos^A) upon (cls^B*cos^A)

Prove that(Tan^2A-tan^2B)=(sin^2A-sin^2B)upon (cos^A*cos^2B)=(cos^2B-c

1.	Prove that(Tan^2A-tan^2B)=(sin^2A-sin^2B)upon (cos^Acos^2B)=(cos^2B-cos^A) upon (cls^Bcos^A)
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