i have a couple of problem here that have been giving me trouble if you can solve any of them that would be great!!
Prove
1. sin3x=(sinx)(3-4sin^2x)
solve for all values in the interval (0-2pie)
2. sin3x=0
Prove
3. csc(x-y)= sec y/ sinx-cosx tany
i have a couple of problem here that have been giving me trouble if you can solve any of them that would be great!!
Prove
1. sin3x=(sinx)(3-4sin^2x)
solve for all values in the interval (0-2pie)
2. sin3x=0
Prove
3. csc(x-y)= sec y/ sinx-cosx tany
1. sin3x=(sinx)(3-4sin^2x)
Start by changing sin3x to sin(2x+x) then use the addition/subtraction identities and go from there. It worked out for me.
yes i did that and then i did one more step but after that i just am getting really confused
does anyone have any answers i really need them today. thanks so much
sin3x=(sinx)(3-4sin^2x)
sin3x=
sin(2x+x)=
sin2x cosx + cos2x sinx =
Eliminate the "2x"s by using identities. Then get all in terms of sine only...eliminate cos[sup:1qy32vwv]2[/sup:1qy32vwv]x using cos[sup:1qy32vwv]2[/sup:1qy32vwv]x + sin[sup:1qy32vwv]2[/sup:1qy32vwv]x = 1.
Please show us your work, indicating exactly where you are stuck - so that we know where to begin to help you.Originally Posted by bballbink
“... mathematics is only the art of saying the same thing in different words” - B. Russell
Prove
1. sin3x=(sinx)(3-4sin^2x)
sin(2x+x)
sin2x cosx+ cos2x sinx
?
solve for all values in the interval (0-2pie)
2. sin3x=0
sin(2x+x)
sin2x cosx+ cos2x sinx
?
Prove
3. csc(x-y)= sec y/ sinx-cosx tany
Originally Posted by bballbink
“... mathematics is only the art of saying the same thing in different words” - B. Russell
Bookmarks