Recent content by Suzan

Homework Statement No air resitance Initial speed 8 m/s inst. time at 3 s Find instantaneous velocity at 3s. Components of displacement: dx= 24 dy= 44 Homework Equations d=v1t+(1/2)a(t)^2 or other kinematics equations The Attempt at a Solution I tried to find the...

Thanks, the second one was easy (funny how stupid one can feel for not getting this..=P) . However, I can see where you're going with replacing 2x=x+x for cosx and sinx, but I'm getting stuck at the first step for both 1 and 3. I am having trouble with especially the third one, where I'm...

Homework Statement (1) (1+cosx)/(sinx)= cot (x/2) (2) 2 csc 2x= sec x csc x (3) cos^6 x- sin^6 x= cos 2x(1 - 1/4sin^2 2x) ( I think this has to do something with subtracting -3a^2b^2, since I need to get a-2ab+b to factor it..?) Homework Equations Addition and Subtraction...