Question

solve and send and tell how did it come ​

Answer 1

9 sec²Α − 9 tan²Α

= 9{sec²Α − tan²Α}

= 9{1}

=9

Answer 2

$9 \sec ^2a - 9 \tan( }^{2} )a = 9$

Sec^2a-tan^2a=1

9(sec^2a-tan^2a)=9(1)

9