Why is (cos2x)(cos2x) =cos^2 2x....i thought it would equal cos^2 4x since the 2's distribute also.....?

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... =cos^2 2x....i thought it would equal cos^2 4x since ... equal cos^2 4x since the 2's distribute also ... Why is (cos2x)(cos2x) =cos^2 2x....i thought ...
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... (30). d) 160. 50 A:::: S2. ~s:::: 432(5 + ~t)2 . ~s ... Since y2 = 4x.4y'2 = 10.s" = 16 ... This derivative set equal to 0 gives x/.x. Since dS/dx ...
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Also generally, it is best to start with the more complicated side and try to change it to the "easier" side. so ... sinx/cosx + cos2x= sinx/cosx + 1
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