Posted by **kwack** on Friday, August 20, 2010 at 8:58pm.

Find the equation of the tangent line to the curve y=5xcosx at the point (pi,–5pi).

The equation of this tangent line can be written in the form y=mx+b where

m=

and b=

- math -
**bobpursley**, Friday, August 20, 2010 at 9:23pm
y=5x cos x

y'=slope m= 5cosx-5xsinx at x=pi

y'=m=-5

line equation: y= -5x+b

now to find b, you know the point(PI,-5PI) is on it, so

-5pi--5PI+b so b=0

## Answer This Question

## Related Questions

- calculus - -find the equation of the tangent line to the curve y=5xcosx at the ...
- math calculus - Use implicit differentiation to find the equation of the tangent...
- Math please help! - Find the equation of the tangent line to the curve: 2(x^2+y^...
- math - Find the equation of the tangent line to the curve y=6tanx at the point (...
- Math - Find the equation of the tangent line to the curve: 2(x^2+y^2)^2 = 25(x^2...
- Calculus. I need help! - HARDER PARTS WAS 3(x^2+y^2)^2=26(y^2+y^2) Find the ...
- COLLEGE CALCULUS. - Use implicit differentiation to find the equation of the ...
- math - Use implicit differentiation to find the equation of the tangent line to ...
- Calculus - Find the equation of the tangent line to the curve y=2sinx at the ...
- Calculus - If f(x)=(3x)/(1+x^2) find f′(4). Use this to find the equation ...

More Related Questions