Friday

December 19, 2014

December 19, 2014

Posted by **Shelley** on Tuesday, October 4, 2011 at 10:31pm.

- calculus -
**Reiny**, Tuesday, October 4, 2011 at 10:42pmf'(x) = 1 + 2cosx

= 0 for a horizontal tangent , (slope=0)

2cosx = -1

cosx = -1/2

x must be in quadrants II or III

and I know that cos π/3 = +1/2

x = π-π/3 or x = π + π/3

x = 2π/3 or x = 4π/3 , for 0 ≤ x ≤ 2π

**Answer this Question**

**Related Questions**

cal - Determine all values of x, (if any), at which the graph of the function ...

Calculus - For what values of x with 0¡Üx¡Ü2¦Ð does the graph of f(x)=x+4sin(x) ...

Calculus - On what values of x does the graph of f(x) = 2x^3 - 3x^2 + 12x + 87 ...

Calculus - Functions? - #1. A cubic polynomial function f is defined by f(x) = ...

Calculus - 2. For what values of x dies the graph of f(x)=2x^3-3x^2-6x+87 have a...

Calculus - For what values of x does the graph of F9x) = 2x^3 - 3x^2 + 12x + 87...

Calculus - 1. On what interval is the function f(x)=x^3-4x^2+5x concave upward? ...

Calculus - consider the function y = 2sinx a) determine dy/dx b) calculate the ...

calculus - For what values of x does the graph of f have a horizontal tangent? (...

Calculus - a)The curve with equation: 2y^3 + y^2 - y^5 = x^4 - 2x^3 + x^2 has ...