Question

高一数学题在线等

1.计算：
(1)2^log(2)8+log(1/3)27+log(3)8+log(3)9/8
(2)4^(3/2)-(3+根号5)^lg1+(根号3)^(-2)
(3)2sin(π/2)+3cos0-cos(π/3)-5sin(3π/2)
大家帮帮忙。。我等着写作业、、

Answer 1

2^log(2)8+log(1/3)27+log(3)8+log(3)9/8
=8-log3 3^3+log3 9
=8-3+2
=7

4^(3/2)-(3+√5)^lg1+(√3)^(-2)
=2^3-0+(1/3)
=(1/3)+8
=25/3

2sin(π/2)+3cos0-cos(π/3)-5sin(3π/2)
=2+3-√3/2+5
=10-√3/2