=-[asin(2 013π+α)+bcos(2 013π+β)]=1.
答案:1
6.解:(1)∵cos=cos=cos=,
tan=tan=tan=1,
∴cos+tan=+1=.
(2)原式=sin(60°+360°)cos(30°+2×360°)+sin[30°+(-2)×360°]cos[60°+(-2)×360°]=sin 60°cos 30°+sin 30°cos 60°
=×+×=1.
7.解:sin(3π+θ)=-sin θ,∴sin θ=-.
原式=+
=+===32.
8.解:∵cos(105°-α)=cos[180°-(75°+α)]
=-cos(75°+α)=-,
sin(α-105°)=-sin(105°-α)=-sin[180°-(75°+α)]
=-sin(75°+α).
又cos(75°+α)=>0,α为第三象限角,
可知角75°+α为第四象限角,
则有sin(75°+α)=-
=- =-.
∴cos(105°-α)+sin(α-105°)=-+=.