The answer from problem 15 is --> cos(2π/5) = 2cos^2(π/5) -1 16. In your answer in problem 15 make the substitution x = cos and solve the quadratic equation for x. 16. In your answer in pro...

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16. In your answer in problem 15 make the substitution x = cos and solve the quadratic equation for x.

The answer from problem 15 is --> cos(2π/5) = 2cos^2(π/5) -1

math Advanced-Math

Answer 1

Answer #1

Answer 2

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