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Popular >

simplify 2cos(pin)

Solution

simplify

2 cos (πn)

Solution

2 (- 1)^{n}

Solution steps

2 cos (πn)

Use the basic trigonometric identity:

cos (nπ) = (- 1)^{n}

= 2 (- 1)^{n}

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Frequently Asked Questions (FAQ)

What is 2cos(pin) ?
The solution to 2cos(pin) is 2(-1)^n