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Find the derivative w = sin4 y cos4y. |
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Answer» W = sin4y cos4y \(\frac{dW}{dy}\) = sin4y \(\frac{d}{dy}\) cos4y + (\(\frac{d}{dy}\) sin4y) cos4y = -4 sin4y cos3y sin y + 4 sin3y cos y cos4y = 4 sin3y cos3y (cos2y - sin2y) = 4 sin3y cos3y cos 2y |
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