Question

the value of 3 sec^ 2 A - 3 tan^2 A

Answer 1

3sec²A-3tan²A
3(sec²A-tan²A)
3(1)
3

answer is three

Answer 2

Answer:

sec2x−tan2x=1

Explanation:

Note that:

sin2x+cos2x=1

Hence:

cos2x=1−sin2x

and we find:

sec2x−tan2x=1cos2x−sin2xcos2x

sec2x−tan2x=1−sin2xcos2x

sec2x−tan2x=cos2xcos2x

sec2x−tan2x=1