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सिद्ध कीजिए। sec2θ + cosec2θ = sec2θ × cosec2θ - Mathematics 2 - Geometry [गणित २ - ज्यामिति]

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Question

सिद्ध कीजिए। 

sec2θ + cosec2θ = sec2θ × cosec2θ   

Sum

Solution

बायाँ पक्ष = sec2θ + cosec2θ

`= 1/cos^2theta + 1/sin^2theta` ............`[because sectheta = 1/costheta, cosectheta = 1/sintheta]`

= `(sin^2theta + cos^2theta)/(cos^2theta.sin^2theta)`

= `1/(cos^2theta.sin^2theta)` ....`(because sin^2theta + cos^2theta = 1)`

= `1/cos^2theta xx 1/sin^2theta = sec^2theta xx cosec^2theta` .............`[because sectheta = 1/costheta, cosectheta = 1/sintheta]`

= दायाँ पक्ष

∴ बायाँ पक्ष = दायाँ पक्ष 

∴ sec2θ + cosec2θ = sec2θ × cosec2θ   

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त्रिकोणमितीय सर्वसमिकाएँ
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Chapter 6: त्रिकोणमिति - प्रकीर्ण प्रश्नसंग्रह 6 [Page 138]

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Balbharati Geometry (Mathematics 2) [Hindi] 10 Standard SSC Maharashtra State Board
Chapter 6 त्रिकोणमिति
प्रकीर्ण प्रश्नसंग्रह 6 | Q 5. (3) | Page 138
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