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

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Prove that √((1-sinA)/(1+sinA))=secA-tanA
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Keep posting sums its very useful sir. Because of covid we are watching videos only.thank you sir..

gousiagousia
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After covid 19 also we will learn from you.your explaining very well sir...

gousiagousia
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Excellent explanation sir thank you sir

shinchanmahara
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I did not understand on the part that 1-sinA/cosA changes to 1/cosA -sinA/cosA 🙏🙏🙏😩

emiekharnaior