Define csc(x): We know that csc(x) is the reciprocal of sin(x), so csc(x)=sin(x)1. To find the limit of csc(x) as x approaches 0, we need to consider the behavior of sin(x) near 0.
Consider sin(x) behavior: Since sin(0)=0, the reciprocal sin(x)1 will become very large as x approaches 0. This means that the limit of csc(x) as x approaches 0 is not finite.
Reciprocal becomes large: We must also consider the behavior from both sides of 0. As x approaches 0 from the positive side, sin(x) is positive, and thus csc(x) is positive and grows without bound. As x approaches 0 from the negative side, sin(x) is negative, and thus csc(x) is negative and decreases without bound.
Behavior from both sides: Since the behavior of csc(x) as x approaches 0 from the positive and negative sides is not consistent (it does not approach a single finite number), the limit does not exist.
More problems from Inverses of sin, cos, and tan: degrees