Monday

September 1, 2014

September 1, 2014

Posted by **Mary** on Thursday, March 7, 2013 at 11:38am.

I have this so far

1) cos(2x+3y) * d/dx (2x+3y)= 3xy' + 3y + 5y'

2) cos (2x+3y) * [2 + 3y']= 3xy' + 3y + 5y'

3) 3y' cos (2x+3y) + 2cos(2x+3y)= 3xy' + 3y + 5y'

4) 3xy' + 5y' - (3y(cos(3x+3y)= 2 cos (2x + 3y) - 3y

If I am wrong, can you please explain to me what I am doing wrong. Thank you

- Derive -
**Steve**, Thursday, March 7, 2013 at 12:02pmAside from the typos in (4) you are ok.

4) 3xy' + 5y' - 3cos(2x+3y)y' = 2 cos (2x + 3y) - 3y

5) (3x+5y-3cos(2x+3y))y' = 2cos(2x+3y) - 3y

6) y' = (2cos(2x+3y)-3y)/(3x+5y-3cos(2x+3y))

- Derive -
**Mary**, Thursday, March 7, 2013 at 12:13pmThank you SO much sir. I feel a lot better knowing that I did this right

**Related Questions**

Calculus 12th grade (double check my work please) - 1.)Find dy/dx when y= Ln (...

TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...

tigonometry - expres the following as sums and differences of sines or cosines ...

Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...

algebra - Can someone please help me do this problem? That would be great! ...

trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...

Math - Calculus - The identity below is significant because it relates 3 ...

Math - Solve this equation algebraically: (1-sin x)/cos x = cos x/(1+sin x) --- ...

Math, derivatives - Let g(x) = sin (cos x^3) Find g ' (x): The choices are a) -...

Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...