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find the equation of the tangent line :)?
An equation of the tangent line to the curve
y=f(x)=x(3cosx−9sinx)
at the point (3pi, f(3pi) is:
Note: Please follow these instructions carefully:
(a) Express f(3pi) and f(3pi) in terms of . Simplify those expressions by evaluating the exact values of sin(3pi) and cos(3pi).
(b) Your answer should be in the form ax+m. When calculating a and m, approximate pi by 3.14.
1 Answer
- 7 years ago
3*pi = pi in unit circle. cos(3pi)=cos(pi)=-1, sin(3*pi)=sin(pi)=0.
I can't see the equation for the tangent line nor what you want f(3*pi) to be in terms of.
