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Show that \[z[\cos\ {(\alpha \ k)]=\ \frac{z^2-z\cos \alpha}{z^2-2(\cos{\alpha)z+1}}}\]
written 4.9 years ago by gravatar for teamques10 teamques10 ★ 70k modified 4.1 years ago by gravatar for krithikkm200 krithikkm200 • 10
engineering mathematics
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