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Secθ + tanθ = θθcosθ1-sinθ - Mathematics 2 - Geometry [गणित २ - भूमिती]

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Question

secθ + tanθ = `cosθ/(1 - sinθ)`

Sum

Solution

डावी बाजू = secθ + tanθ

= `1/cosθ + sinθ/cosθ`

= `(1 + sinθ)/cosθ`

= `(1 + sinθ)/(cosθ) xx (1 - sinθ)/(1 - sinθ)` ....[अंशाचे परिमेयकरण करून]

= `(1^2 - sin^2θ)/(cosθ(1 - sinθ)) = (1 - sin^2θ)/(cosθ(1 - sinθ))`

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

= `cosθ/(1 - sinθ)` = उजवी बाजू

∴ secθ + tanθ = `cosθ/(1 - sinθ)` 

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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. (8) | Page 132
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