1. ## continuity of trigonometric

determine where f is continuous.

a) f(x)=sin^-1(2*x)
b) f(x)=exp(sinx/x)
c) f(x)=(sin^-1(1/x))/(x)
d) f(x)=ln|x|-2*ln(x+3)

2. all these functions are continuous in the intervals where they are defined. i will give u the following hints:
1)-pi/2<=sin^-1(x)<=pi/2
2)2<e<3
3)same as 1
4)for ln(x) x>0