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Join this website and enjoy your time here as it might take you a while! Posted 5 years ago. Over here the derivative of cosine of x looks like it is zero and negative sine of x is indeed zero. View All. Just click the Categories section and you will be simply blown away by the variety of porn that they offer. With thousands of scenes and daily updates you will simply have the need to come back to this website again and again. The derivative of cosine of x here looks like negative one, the slope of a tangent line and negative sign of this x value is negative one. Straight Games History Hist. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. So now let's think about cosine of x. So it actually turns out that it is the case, that the derivative of cosine of x is negative sine of x. So let's start with sine of x.

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