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Popular >

simplify cos(npi(-1))

Solution

simplify

cos (nπ (- 1))

Solution

(- 1)^{- n}

Solution steps

cos (nπ (- 1))

Use the basic trigonometric identity:

cos (nπ) = (- 1)^{n}

= (- 1)^{- n}

Popular Examples

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2 + sec (\frac{2 π}{3} + x)

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sec (arctan (\frac{1}{x}))

Frequently Asked Questions (FAQ)

What is cos(npi(-1)) ?
The solution to cos(npi(-1)) is (-1)^{-n}