Question

(sec thita+1)(sec thita-1)​

Answer 1

Answer:

(sec∅+1)(sec∅-1)

=(1/cos∅+1)(1/cos∅-1)

=(1+cos∅/cos∅)(1-cos∅/cos∅)

=1²-cos²∅/cos²∅

= sin²∅/cos²∅

= tan²∅

hope it helps...!!!