arcsin1,arctan1等于多少

1152_864
limit(arctan(3*x)/arcsin(x),x = 0)
记号arcsinx的含义: (1) x [ 1,1]; (2) arcsinx表示一个角,且 arcsin
1080_810
sinπ/6=1/2,arcsin1/2=π/6 sin0=0,arcsin0=0 2&