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Cosec θ.1-cos2θ=1 हे सिद्ध करा. - Mathematics 2 - Geometry [गणित २ - भूमिती]

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Question

cosec θ.`sqrt(1 - cos^2theta) = 1` हे सिद्ध करा.

Sum

Solution

डावी बाजू = `"cosec"  θ xx sqrt(1 - cos^2theta)`

= `"cosec"  θ xx sqrt(sin^2theta)`   ......`[(because sin^2theta + cos^2theta = 1),(therefore 1 - cos^2theta = sin^2theta)]`

= cosec θ × sin θ

= 1     ......[∵ sin θ × cosec θ = 1]

= उजवी बाजू 

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Chapter 6: त्रिकोणमिती - Q १ ब)

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Chapter 6 त्रिकोणमिती
Q १ ब) | Q ३.
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