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सिद्ध कीजिए। tanθsecθ-1=tanθ+secθ+1tanθ+secθ-1 - Mathematics 2 - Geometry [गणित २ - ज्यामिति]

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Question

सिद्ध कीजिए। 

`tantheta/(sectheta - 1) = (tantheta + sectheta + 1)/(tantheta + sectheta - 1)`

Sum

Solution

`1 + tan^2theta = sec^2theta` ................(सर्वसमिका)

∵ `tan^2theta = sec^2theta - 1`

∴ `tantheta xx tantheta = (sectheta + 1)(sectheta - 1)`

∴ `tantheta/(sectheta - 1) = (sectheta + 1)/tantheta`

तुल्य अनुपात के सिद्धांत से,

`tantheta/((sectheta - 1)) = ((sectheta + 1))/tantheta = (tantheta + sectheta + 1)/(sectheta - 1 + tantheta)`

∴ `tantheta/(sectheta - 1) = (tantheta + sectheta + 1)/(tantheta + sectheta - 1)`.

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त्रिकोणमितीय सर्वसमिकाएँ
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Chapter 6: त्रिकोणमिति - प्रश्नसंग्रह 6.1 [Page 132]

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Balbharati Geometry (Mathematics 2) [Hindi] 10 Standard SSC Maharashtra State Board
Chapter 6 त्रिकोणमिति
प्रश्नसंग्रह 6.1 | Q 6. (12) | Page 132
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