Report copyright - Β Β· 2017-11-09Β Β· π₯= 1 2 + 1 2 ππ2π tan(π΄βπ΅) = πΌπ‘πΌπ΄βπΌπ‘πΌπ΅ 1 + πΌπ‘πΌπ΄πΌπ‘πΌπ΅ sin(π΄βπ΅
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