Question

prove the above question​

Answer 1

Answer:

A+B=90

=>B=90-A........(i)

wkt, sec²A-tan²A=1

sec²A- cot²(90-A)=1

[since, tan²@=cot²(90-@) ]

sec²A-cot²B=1.......(i)

a²-b²=1 (from given)

hence proved

hope it helps u.....^_^