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Popular >

simplify cos(kpi)

Solution

simplify

cos (kπ)

Solution

(- 1)^{k}

Solution steps

cos (kπ)

Use the basic trigonometric identity:

cos (nπ) = (- 1)^{n}

= (- 1)^{k}

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Frequently Asked Questions (FAQ)

What is cos(kpi) ?
The solution to cos(kpi) is (-1)^k