sin A -2sin3 AtanA2cos3 A - cos A21. Prove that:ch-22.cubical block of – InterviewSolution

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1.	sin A -2sin3 AtanA2cos3 A - cos A21. Prove that:ch-22.cubical block of side 10 cm is surmounted by a hemisphere. What is the largest diameter that thehemisphere can have ? Find the cost of painting the totalsurface area of the solid so formed, at the raternr5 per 100 sq. crn. I Use Tt-3.141
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