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ICSE Class X Math 2019 Paper

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Question : 5 of 32
Marks: +1, -0
Prove that:
(csc⁡θ−sin⁡θ)(sec⁡θ−cos⁡θ)(tan⁡θ+cot⁡θ)=1(\csc \theta - \sin \theta)(\sec \theta - \cos \theta)(\tan \theta + \cot \theta)=1
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