计算：(12)-1+(5+3)°-2sin45°+12+1．

题型：解答题难度：一般来源：张家界

计算：(

1

2

)-1+(5+

3

)°-2sin45°+

1

2 +1

．

答案

原式=2+1-2×

2

2

+

1

2 +1

×

2 -1

2 -1

=2+1-

2

+(

2

-1)
=2+1-

2

+

2

-1
=2．