https://img827.imageshack.us/img827/...at15052013.jpg
soru 4 tan toplam formullerinden tan45-x/1+tan45.tanx den 1-x/1+x olur diğeri de yine tolam formulğnden 1+x/1-x olur bundan 1/y
https://img59.imageshack.us/img59/7108/mat16052013.jpg