For a sec

For a sec Sec. is short for ___. w8 a sec 英语翻译5.2.Three Coordinated SEC Policies Consider three interrelated SEC decisions regarding the regulation of investment banks.First,the SEC in 2004 exempted the five largest investment banks from the net capital rule,which was a 1975 rule for sec(a-pi/2)=? sec(a+pi/2)=? 初二英语sec.is short for ( )意思 请问 既然wait 是不及物动词 一般有 wait for...那为什么还有 wait a sec.的短语 求救! 若sec a>0且csc a 化简：sec ^2 a - tan^2 a 三角函数 sec(2a)=sec^a/1-tan^a求证 三角函数 sec(2a)=sec^a/1-tan^acsc(2a)=1/2seca*csca Hold on a sec的意思是什么 10 times rated power for 5 Sec.怎么翻译? 求证:sec(pai/4+a)*sec(pai/4-a)=2sec2a 求证恒等式：（tan a+sec a-1)/(tan a -sec a+1)=（1+sin a）/cos a 三角函数中sin a与sec a有什么关系? 化简：1/sec^2a＋1/csc^2a take a it`ll only take a sec.