Today, we will solve some more problems using mathematical induction.
Problem 7. Observe that $$\cos 2 \alpha = 2 \cos^2 \alpha - 1$$
Prove that we can write $\cos n\alpha$ as a polynomial of $\cos \alpha$.
Math for the curious
Showing posts with label Chebyshev polynomial. Show all posts
Showing posts with label Chebyshev polynomial. Show all posts
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