\frac{\cos(\theta) + \cos(-\theta)}{\tan(\theta) + \cot(\theta)}
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cos(0) = 1, because the cosine of 0 degrees is always 1. cos(π/7) is a specific value that can be calculated using a calculator or a trigonometric table. Let's assume it is x. tan(0) = 0, because the tangent of 0 degrees is always 0. cot(π/7) is the reciprocal Show more…
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