42 Questions around this concept.
$f(x)=\sin ^{-1} x+\cos ^{-1} x$ is differentiable in:
Differentiability in an Interval
A) A function $f(x)$ is differentiable in an open interval $(a, b)$ if it is differentiable at every point on the open interval $(a, b)$.
B) A function $y=f(x)$ is said to be differentiable in the closed interval [a, b].
1. If $f(x)$ is differentiable at every point on the open interval $(a, b)$. And,
2. It is differentiable from the right at "a" and the left at "b". is said to be differentiable in [a, b].
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Mathematics for Joint Entrance Examination JEE (Advanced) : Calculus
Page No. : 4.18
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