Im not sure what you mean on the second one.
I used the fact that on the denominator to be able to use the standard limit.
Hey i am not really good with limits that have sin,cos, and etc so i was wondering if i could have some help with these 2 questions in finding the limits.
A) lim[sin(1-√x )] / (x-1)
B) lim cos(π/ √19-3 sec 2t )