Answer:
For x < 0 and x > 0, f(x) = sin x ? cos x. Since and
cosine function are continuous function, therefore being difference of two
continuous function, f is continuous. At x = 0
= 0 ? 1 = ? 1
Also f(0) = ? 1
Since
Therefore f is continuous at x = 0.Hence f is a
continuous function.
Find the values of k so that f is continuous at the
indicated point (Ex. 26-29).
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