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# Use differentials (or equivalently, a linear approximation) to approximate sin(41∘)?

as follows: Let f(x)=sin(x) and find the equation of the tangent line to f(x) at a "nice" point near 41∘.

### 1 Answer

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- alexLv 76 months ago
Hint:

The "nice" point near 41∘ is 45∘ = π/4 radian

the equation of the tangent line to f(x) at x=π/4

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