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20 10 how to do the second question of the 23 rd question of Liaoning college entrance examination mathematics and science
From the first question, we know M(pi/3, pi/3), so the rectangular coordinate M(pi/6, root number 3pi/6).
And a (1, 0), so x= 1+tcosa, y=sina,
There's another one we don't know.
Because tana=[ root 3pi/6] divided by [pi/6- 1]
As long as we regard the numerator as Sina and the denominator as cosa, it will be OK.