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Sec θ(1 - sin θ) (sec θ + tan θ) = 1 - Mathematics 2 - Geometry [गणित २ - भूमिती]

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Question

sec θ(1 - sin θ) (sec θ + tan θ) = 1

Sum

Solution

डावी बाजू = sec θ(1 - sin θ) (sec θ + tan θ)

= `1/cos θ(1 - sin θ)(1/cos θ + sin θ/cos θ)`

= `(1 - sin θ)/cos θ((1 + sin θ)/cos θ)`

= `(1 - sin^2θ)/(cos^2θ)`

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

= 1

= उजवी बाजू

∴ sec θ(1 - sin θ) (sec θ + tan θ) = 1 

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त्रिकोणमितीय नित्यसमानता
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Chapter 6: त्रिकोणमिती - संकीर्ण प्रश्नसंग्रह 6 [Page 138]

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Balbharati Geometry (Mathematics 2) [Marathi] 10 Standard SSC Maharashtra State Board
Chapter 6 त्रिकोणमिती
संकीर्ण प्रश्नसंग्रह 6 | Q 5. (1) | Page 138
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