overall accuracy: 80% record: 9 score: 9 d/dx (cos x) = sin x -1/sqrt(1 - x^2) 1/sqrt(1 - x^2) - sin x high…

overall accuracy: 80% record: 9 score: 9 d/dx (cos x) = sin x -1/sqrt(1 - x^2) 1/sqrt(1 - x^2) - sin x high score board: overall you must have at least 100 to be on the board. # name record

overall accuracy: 80% record: 9 score: 9 d/dx (cos x) = sin x -1/sqrt(1 - x^2) 1/sqrt(1 - x^2) - sin x high score board: overall you must have at least 100 to be on the board. # name record

Answer

Explanation:

Step1: Recall derivative formula

The derivative of $\cos x$ with respect to $x$ is a well - known result in calculus. The formula for the derivative of $\cos x$ is $\frac{d}{dx}(\cos x)=-\sin x$.

Answer:

D. $-\sin x$