Show that is independent of .

MATHEMATICS · Subjective · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

Show that cos⁡2θ+cos⁡2(α+θ)−2cos⁡αcos⁡θcos⁡(α+θ)\cos^2 \theta + \cos^2(\alpha + \theta) - 2 \cos \alpha \cos \theta \cos(\alpha + \theta) is independent of θ\theta.

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