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Θθ1-sinθ1+sinθ = secθ - tanθ - Mathematics 2 - Geometry [गणित २ - भूमिती]

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Question

`sqrt((1 - sinθ)/(1 + sinθ))` = secθ - tanθ

Sum

Solution

डावी बाजू = `sqrt((1 - sinθ)/(1 + sinθ))` 

= `sqrt((1 - sinθ)/(1 + sinθ) xx (1 - sinθ)/(1 - sinθ))` .....[छेदाचे परिमेयकरण करून]

= `sqrt((1 - sinθ)^2/(1 - sin^2θ)`

= `sqrt((1 - sinθ)^2/cos^2θ)` ...`[(∵ sin^2θ + cos^2θ = 1), (∴ 1 - sin^2θ = cos^2θ)]`

= `(1 - sinθ)/(cosθ) = 1/cosθ - sinθ/cosθ`

= sec θ - tan θ

= उजवी बाजू

∴ `sqrt((1 - sinθ)/(1 + sinθ))` = sec θ - tan θ 

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त्रिकोणमितीय नित्यसमानता
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Chapter 6: त्रिकोणमिती - सरावसंच 6.1 [Page 132]

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Balbharati Geometry (Mathematics 2) [Marathi] 10 Standard SSC Maharashtra State Board
Chapter 6 त्रिकोणमिती
सरावसंच 6.1 | Q 6. (3) | Page 132
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