Determine the intervals on which the graph of the following curve is concave up/down : x = cos(t), y = sin(2t), on [0, 2π]
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![Determine the intervals on which the graph of the following curve is concave up/down :
x = cos(t), y = sin(2t), on [0, 2π]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffadb4919-1744-4244-9507-dd693bbcc095%2Fc9ebaa9e-40d9-4e61-bc4f-78b42fc37302%2Ffpfoftj_processed.png&w=3840&q=75)
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