Question

9+sec+square+A-9+tan+spuare+A=9

Answer 1

Step-by-step explanation:

To prove-:

9Sec²A-9Tan²A=9

Solution-:

L.H.S.

=>9(Sec²A-Tan²A)

By identity [Sec²A-Tan²A=1]

=>9*1

=>9 = R.H.S.

As l.h.s. = R.h.s

So, Hence Proved