Find the exact value without using a calculator.
-$\cos 2 \pi$
A) $- 1$
B) 1
C) $\frac { 1 } { 2 }$
D) 0

Name: Find the exact value without using a calculator. -$\cos 2 \pi$ A) $- 1$ B) 1 C) $\frac { 1 } { 2 }$ D) 0
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Quizplus · Accepted Answer

The cosine of $2\pi$ radians (which is equivalent to 360 degrees) equals 1, as it corresponds to one complete revolution on the unit circle, returning to the starting point (1,0).

Find the Exact Value Without Using a Calculator cos⁡2π\cos 2 \picos2π

Find the Exact Value Without Using a Calculator $\cos 2 \pi$