LimitsHard
Question
The function f(x) = sin-1 (cos x) is:
Options
A.discontinuous at x = 0
B.continuous at x = 0
C.differentiable at x = 0
D.none of these
Solution
f(x) = sin-1(cosx) = 
- cos-1(cos x) = 
continous but not differentiable at x = 0
- cos-1(cos x) = continous but not differentiable at x = 0
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