Mathematical polar coordinates and parametric equations, how to do the second question? Want the process! - Training Enrollment Network

Mathematical polar coordinates and parametric equations, how to do the second question? Want the process!

(2) the curve C 1:{x=tcosαy=tsinα(t is a parameter, t≠0) is transformed into an ordinary equation: y=xtanα, where 0 ≤

∴A(2sinα,α),B(23√cosα,α).

∴|AB|=|2sinα？ 23√cosα|=4|sin(α？ π3)|,

When α=5π6, the maximum value of |AB| is 4.

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