If two curves just touch each other, then how many tangent lines can be drawn from the point where these curves touch.
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1What does a "tangent line" mean to you in this context? – hmakholm left over Monica Oct 10 '16 at 16:57
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Recall the meaning of a tangent, and then you will see the answer. – Sarvesh Ravichandran Iyer Nov 05 '16 at 02:32