Question

sec ∅(1- sin∅)(sec∅+tan∅)​

Answer 1

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secØ(1-sinØ)(secØ+tanØ)

=1/cosØ(1-sinØ)(1+sinØ/cosØ)

=1-sin²Ø/cos²Ø

=cos²Ø/cos²Ø

=1