that makes sense i think there's a typo on the assignment then cause it says (p,q) are the coordinates of the vertex in the form of y=a(x-p)^2+q
and then it gives y=2(x-4)^2-3
was trying to graph this and isn't the vertex (-4,-3), so then how could those x intercepts be right since they are both on positive side of the x axis, and the vertex is in the negative side?
Im In a 1st Year University math class and its been a while since i did this stuff and can't remember if I am doing this question right so any help would be much appreciated.
The question is to find all the info from the equation y=2(x-4)^2-3
I used the b+/- b^2 -4ac... equation and ended...
I have a question that says: prepare a table of values and plot the graph for the domain (-pie,pie) for the function f(x)=2sin(2x)
I understand how to do that for y=sinx, but for this function the wave compresses horizontally and stretches vertically so isn't the domain now (-pie/2,pie/2) and...
I have a question that says: prepare a table of values and plot the graph for the domain (-pie,pie) for the function f(x)=2sin(2x)
I understand how to do that for y=sinx, but for this function the wave compresses horizontally and stretches vertically so isn't the domain now (-pie/2,pie/2) and...
Im In a 1st Year University math class and its been a while since i did this stuff and can't remember if I am doing this question right so any help would be much appreciated.
The question is to find all the info from the equation y=2(x-4)^2-3
I used the b+/- b^2 -4ac... equation and ended...
how can cosx and cos2x both be 1/5?
Also here's how i did those 2 questions I am just wondering why they are wrong?
cos2x=1-2sin^2x
=1-2(-2 squareroot 6/5)squared
=1-2(24/25)
=23/25
tan2x=2tanx/1-tan^2x
=2(-2 squareroot 6)/1-6
=-4 squareroot 6/-5
=4 squareroot 6/5
Ok just to make sure I am doing it correctly here are the answers i got, would be great if you could tell me if i totally messed it up lol.
I got:
sinx= -2 squareroot 6/5
tanx= -2 squareroot 6
sin2x= -4 squareroot 6/25
cos2x= 23/25
tan2x= -4 squareroot 6/5
thanks for all the help!