A Annie :O) Guest Jun 6, 2008 #1 3sin2x=4cosx, x is between 0 and 360? I don't know how to do the symbol for pie, sorry!
A AskAway Guest Jun 6, 2008 #2 a) 2sinx = 6cosx sinx = 3cosx tanx = 3 x = arctan(3) b) 3sin2x = 4cosx 3(2sinxcosx) = 4cosx sinx * cosx = 2/3 cosX sinx = 2/3 x = acrsin(2/3) I guess you will have to use a calculator because 3 and 2/3 are not on the unit circle.
a) 2sinx = 6cosx sinx = 3cosx tanx = 3 x = arctan(3) b) 3sin2x = 4cosx 3(2sinxcosx) = 4cosx sinx * cosx = 2/3 cosX sinx = 2/3 x = acrsin(2/3) I guess you will have to use a calculator because 3 and 2/3 are not on the unit circle.
