How do you use the equation given $f(x)=csc(x)$ to find f '' (π/4)?

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Answer 1 · 2017-12-25T14:52:40

$pi=180°$
$pi/4=45°$
given: $f(x)=csc(x)$
$f(pi/4)=csc45°$
$f (pi/4)=sqrt (2)$
{ we know that $csc(x)=1/sin(x)$ $}$ & $[sin 45°=1/sqrt2]$

How do you use the equation given f(x)=csc(x)f(x)=csc(x) to find f '' (π/4)?