Question: 4. Let f(x) = arcsin (#- - 2 arctan(Vr). The domain of f is {r ER | r > 0}. (a) Evaluate f(0). (b) Compute

 4. Let f(x) = arcsin (#- - 2 arctan(Vr). The domain

of f is {r ER | r > 0}. (a) Evaluate f(0).

4. Let f(x) = arcsin (#- - 2 arctan(Vr). The domain of f is {r ER | r > 0}. (a) Evaluate f(0). (b) Compute f'(x) and simplify it as much as you can (if it doesn't look simple, keep simplifying!). (c) Prove the identity arcsin ( = 2 arctan(vr

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