関連ワード:  relationship between sec^2 and tan^2    relationship between sec 2 and tan 2    relation between sec 2x and tan 2x    relationship between sec 2 theta and tan 2 theta    relationship between sec 2 x and tan 2 x    relationship between tan 2x and sec 2x    if cos a=(2)/(3) then 2 sec^(2)a+2 tan^(2)a-7 is equal to    sec 2 is equal to  
結果 : relationship between sec^2 and tan^2