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OpenStudy (anonymous):
Show that the curve with parametric equations x=sint, y=cost, z=(sint)^2 is the curve of intersection of the surfaces z=x^2 and x^2 + y^2 =1. Use this fact to help sketch the curve
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OpenStudy (anonymous):
no idea where to start, can someone guide me?
OpenStudy (nikvist):
use trigonometric identity \[\cos^2{\alpha}+\sin^2{\alpha}=1\]
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