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I seem to have a mental block with this problem  can someone help please.
If x = sin t and y = cos 2t find dy/dx in terms of x and prove that d^2y / dx^2 + 4 = 0.
 one year ago
 one year ago
I seem to have a mental block with this problem  can someone help please. If x = sin t and y = cos 2t find dy/dx in terms of x and prove that d^2y / dx^2 + 4 = 0.
 one year ago
 one year ago

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cwrw238Best ResponseYou've already chosen the best response.0
i've got as far as finding dy/dx in terms of t.
 one year ago

Yahoo!Best ResponseYou've already chosen the best response.1
x = sin t dx / dt = cos t y = cos 2t dy/dt = 2sin2t
 one year ago

Yahoo!Best ResponseYou've already chosen the best response.1
dy/dx = 2sin2t / cos t
 one year ago

Yahoo!Best ResponseYou've already chosen the best response.1
dy/dx = (dy / dt )/(dx/dt)
 one year ago

cwrw238Best ResponseYou've already chosen the best response.0
ahhh  ok my stupidity i got dy/dt wrong!!!!
 one year ago

cwrw238Best ResponseYou've already chosen the best response.0
my brains in low gear today....
 one year ago
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