Recent content by palui123

Question: Differentiate the following Equation ignore the " =5(3x+5)^4 " wrongly type. . .

Homework Statement (3x+2)^5.(x+1)^-2 Homework Equations dy/dx = dy/du . du/dx The Attempt at a Solution y=(3x+5)^5 . (x+1)^-2 u = 3x + 5 , du/dx = 3 v = u^5 , dv/du = 5u^4 = 15(3x+5)^4 u = x + 1 , du/dx = 1 v = u^-2 , dv/du = -2u^-3 -2(x+1)^-3 dy/dx = 15(3x+5)^4 ...

w8. . . nvm. I know how to this question now. sin 2t = 2 sint cost since cost = 4/5 , a=4 , h=5 , o=?? P.theorem: a^2=b^2+c^2 o=3 then sint = 3/5 then subtitude =D . . . solve get the answer. . .I'm talking by myself T-T ask = me , answer = me T-T . AID ME NEXT TIME PLEASE. . . .

Formula: Sin2t = 2 sint costWhat I do is: Sin2t = 2sint cost since cost = 4/5 sin2t = 2sint (4/5) sin2t = 8sint/5 What should I do then..? I know its wrong

Homework Statement t = tetha FInd sin 2t when cos t = 4/5 Homework Equations no idea The Attempt at a Solution no. . . . btw what should I do 1st? I don't understand this question

Roger that. . .

OHOHOHOHO! THANNK U VERY MUCH . IVe DOne it. . .HMM it was a silly mistake that took me so long. . . How about the "Question 3" what does it mean by "6v 0.5ohm" and "12V 1ohm" . Never been through it before. . .

I didn't see ur reply. . . testing now. . .

I summarize up the equation I have. Node 1 280=11V1-5V2-V3 Node 2 40=2V1+20V2-27V3 Node 3 0=5V1-17V2+10V3 Correct? after this what method should I use. If I use Matrix method . I find out it will become a big number.

Owhowh owh. . . okok after this I should use matrix solving to solve those 3 equation right? btw Do you have any other recommended method other than using Matlab and Matrix??

My bad. . . Node 2 I4+I3=I6+2A (V2-V3)/1+(V1-V3)/10=(V3/4)+2 (x10) 10V2-10V3+V1-V3=(10V3/4)+20 (x4) 40V2-40V3+4V1-4V3=10V3+80 4V1+40V2-54V3=80 Node 3 I2=I4+I5 (V1-V2)/2 = V2/5 + (V2-V3)/1 (x5) (5V1-5V2)/2 = V2+5V2-5V3 (x2) 5V1-5V2=2V2+10V2-10V3 5V1-17V2-10V3=0...

Node 1 I=I1+I2+I3 28=v1/2+(v1-v2)/2+(v1-v3)/10 (x2) 56=V1+V1-V2+(v1-v3)/5 (x5) 280=5V1+5V1+5V2+V1-V3 280=11V1+5V2-V3 Am I correct?? I did it many times. If not correct me. .

No one helping? or it is just the image that I post is illegal...?

hmm. . . I'm not sure about this. But shouldn't ur V2 in node 2 be "V2= 0.5V1/0.6 + 0.3 / 0.6" instead of "V2= 0.5V1 + 0.3 / 0.6" O.O correct?

I've been doing this question for like 2 days and what I find is wrong answer all over again. This is my last resort and I hope my hope is bright. Please if anyone knows how to do it. Include the steps and explanation. I need to understand the concept X_X...