Question

For the following exercise,

Find the exact value of each trigonometric function.

$\cos \frac{\pi}{6}$

Solution

VerifiedAnswered 2 years ago

Answered 2 years ago

Step 1

1 of 6When drawing a vertical line from the point on a unit circle corresponding to an angle of $\frac{\pi}{6}$ to the point corresponding to the angle of $-\frac{\pi}{6}$, we obtain the *equilateral triangle*, as shown below:
Thus, the sides with lengths $2y$ and $1$ are equal, that is:

$2y=1$

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