prove that tan^2A - tan^2B = cos^2 B - cos^2 A / cos^2 B cos^2 A
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tan^2A - tan^2B = cos^2 B - cos^2 A / cos^2 B cos^2 A
sec^2A-1-sec^2B+1
1/cos^2A-1/cos^2B
cos^2 B - cos^2 A / cos^2 B cos^2 A Ans.
May this help u
sec^2A-1-sec^2B+1
1/cos^2A-1/cos^2B
cos^2 B - cos^2 A / cos^2 B cos^2 A Ans.
May this help u
chiragverma:
plz edit and write in good language
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