Math, asked by masoodhalith22, 1 year ago

(sin A+tan A-1) (sec A-tan A+1)=2 tan A

Answers

Answered by sandy1816

Answer:

(secA+tanA-1)(secA-tanA+1)

=(secA+tanA-1){secA-(tanA-1)}

=sec²A-(tanA-1)²

=sec²A-tan²A+2tanA-1

=1+2tanA-1

=2tanA

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