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$\frac{d}{dx}\left(\cos\left(\frac{\pi}{4}\right)\cos\left(\frac{\pi}{3}\right)+\sin\left(\frac{\pi}{4}\right)\sin\left(\frac{\pi}{3}\right)\right)$
Learn how to solve differential calculus problems step by step online. Find the derivative of cos(pi/4)cos(pi/3)+sin(pi/4)sin(pi/3). Simplifying. Simplifying. The derivative of the constant function (0.9659258) is equal to zero.