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 2 years 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.
 2 years 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.

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cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.0i've got as far as finding dy/dx in terms of t.

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

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

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.0ahhh  ok my stupidity i got dy/dt wrong!!!!

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.0my brains in low gear today....
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