The qeustion was what is the 50th dy/dx of F(x)=Cos(2x)(adsbygoogle = window.adsbygoogle || []).push({});

this is what i did

1st------dy/dx=-2Sin(2x)

2nd------dy/dx=-4Cos(2x)

3rd-------dy/dx=8Sin(2x)

4th-------dy/dx=16Cos(2x)

5th-------dy/dx=-32Sin(2x).....now that it reapeated itself its time to figure out the 50th. thats where im confused. My problem is with the negative signs. how can i catch that patteren.....

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# 50th dy/dx

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