(本题共有2小题,每小题4分,共8分)(1)计算:; (2)解方程组:
(本小题满分12分,每题6分)(1)计算:.(2)解方程组:.
(本题8分)计算:(1); (2)
(本题共有2小题,每小题4分,共8分) (1)计算:; (2)解方程组:
(1)计算;; (2) 解方程:.
(1)计算:+﹣sin45° (2)化简:
(本题20分,每题5分)计算:(1)(2)(3)(4)
(1)计算:++(-1)0-2sin45°; (2)解方程:.
(1)计算:-2sin45°+(2)化简:
(本题8分)(1)计算: (2)解分式方程;
(1)计算:+﹣sin45°(2)化简:
(每小题4分,共8分)(1)计算:(2)化简
(每小题5分,共10分)(1)计算:2cos45°- (2)解方程:=2x+4
(1)计算:()0 - ()-2 + ; (2)解方程: - = 2.
(1)计算:-2cos60°+; (2)()÷