Let \( f \) be a differentiable function satisfying
\[
\int_{0}^{f(x)} f^{-1}(t) d t-\int_{0}^{x... VIDEO
Let \( f \) be a differentiable function satisfying
\[
\int_{0}^{f(x)} f^{-1}(t) d t-\int_{0}^{x}(\cos t-f(t)) d t=0 \text { and } f(0)=1
\]
So find \( f(x) \)
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