Use the identity cos(x + h) = cos(x) cos(h) – sin(x) sin(h) and the fundamental trig limit, to prove: d [cos(x)] = - sin(x) dx

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Q: Let f(z)= z* –4z° +11z? -14z+10. Given that 1+i is a zero of f, find the other zeros of f.

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A: The correlation coefficient is 0.8137.

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Q: W 4. A cell phone company claims that the average time a person spends on their phone is 12.8 hours…

A: Let μ denote the population mean and x⎯⎯ denotes the sample mean. Then, μ=12.8 and x⎯⎯=12.2 Let n be…

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Q: Does a statistics course improve a student's mathematics skills,as measured by a national test?…

A: From the given information,   Student Before After Absolute Difference Sign 1 430…

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A: We have to find mean and stanadard deviation..

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A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…