Yea your right that's what i meant -2(Eq 1) + Eq 2.
I was doing it right all along? Cool. I understand what I have to do next it seems much more less confusing than before. Thanks a lot now I can finally finish this question off. :D
Just finished I got the point of intersection between the...
Homework Statement
Find the point of intersection of the line and the plane.
Line: x=4+k
y=2-2k
z=6+3k
Plane: x=-1-s+2t
y=1-s+4t
z=2+3s+t
Homework Equations
None.
The Attempt at a Solution
So I'm not that well informed with how...
dosen't matter i was able to solve it, but here's another problem which I'm now stuck with. cosx+cos2x+cos3x=cos2x(1+2cosx).
I've tried many things with this problem, but always seem to get lost.
The only given identites which I'm given to use:
cos2x=cos^2x-sin^2x
cos2x=2cos^2x-1...
Homework Statement
sin4x-sin2x/sin2x=cos3x/cosx
Homework Equations
sin2x = 2sinxcosx
The Attempt at a Solution
LS = sin(2x + 2x) - sin2x/sin2x
= sin2xcos2x + cos2xsin2x - sin2x/sin2x
= 2sin2xcos2x - sin2x/sin2x
This is where i get stuck...
I don't know what happens if you try...