Question

Prove that 1-sinA/1+sinA = (secA -tanA)square

Answer 1

Here is your answer~~

1-sinA/1+sinA

(1-sinA) to multiple and divide---

$1+sin^2A-2sinA/cos^2A$

$sec^2A+tan^2A-2secA.tanA$

$(secA-tanA)^2$

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