Tuesday

September 30, 2014

September 30, 2014

Posted by **Hannah** on Monday, January 17, 2011 at 7:20pm.

- Math -
**jennifer**, Monday, January 17, 2011 at 7:22pmthe perimeter of parallelogram is 52cm,and jk is 2cm longer than jm.

find jk

find jm

- Math -
**helper**, Monday, January 17, 2011 at 7:37pmIntegrate cos (2x/3) dx

u = 2x/3

du = 2/3 dx

3/2 du = dx

I = integrate symbol

I cos (2x/3) dx = I cos u 3/2 du

I cos (2x/3) dx = 3/2 I cos u du

I cos (2x/3) dx = 3/2 sins u

since, u = 2x/3

I cos (2x/3) dx = 3/2 sin (2x/3)

- Math -
**helper**, Monday, January 17, 2011 at 7:46pmI cos (2x/3) dx = 3/2 sin (2x/3)

sorry, forgot 0 to pi/2

3/2 sin 2/3 (pi/2) - 3/2 sin 0

3/2 sin (2pi/6) - 0

3/2 sin (pi/3)

3/2 (sqrt3/2)

3 sqrt3/4

**Answer this Question**

**Related Questions**

calc - find the area between the x-axis and the graph of hte given function over...

math - how to define arc cosine(cosine x) for -360 deg<x< 360 deg?? a ...

Calculus - I'm supposed to find the average value of the function over the given...

Calculus - I have two questions, because I'm preparing for a math test on monday...

math - h(t)=cos t, [pi/4, 3pi/4] find the average rate of change of the function...

math - Eliminate the parameter (What does that mean?) and write a rectangular ...

math - A trigonmetric polynomial of order n is t(x) = c0 + c1 * cos x + c2 * cos...

calculus - g(t)=2+cos t; [0,pi] Can you help me find the average rate of change ...

calculus - Evaluate the following integrals using the given substitutions. (a) (...

Math - PreCalc (12th Grade) - The function f(x) = 2x + 1 is defined over the ...