- #1

SwedishFred

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## Homework Statement

Deside curve tangent in point x=-π/4

## Homework Equations

f(x)=1/3sin(3x-π/4)

y=f(x)

## The Attempt at a Solution

f`(-π/4)=-1

using the tangent equation

y=kx+m

y=-1*(-π/4)+m

y=1/3sin(3(-π/4)-π/4)

≈3.33*10^-14

3.33*10^-14=-1*(-π/4)+m

f(x)≈-1*(-π/4)+0,79

is this right ? I have a bad feeling...