Mathematics
Senior High
171・172(1)ア・(2)の解き方を教えてください。お願いします。
答えは 171 : a=12分のπ,b=-2
172(1)ア: Θ=12分の7π,12分の23π
172(2) : 0≦x≦4分のπ,x=π です。
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