Question

use a calculator to find the value of the trigonometric function to four

cos\\(\frac{\pi}{15}\\)

\\(\cos\frac{\pi}{15}\approx\square\\) (round your answer to four decimal places.)

Explanation:

Step1: Convert the angle to degrees

Since \( \frac{\pi}{15}\times\frac{180^{\circ}}{\pi}=12^{\circ}\)

Step2: Calculate using calculator

Using a calculator in degree mode, \( \cos(12^{\circ})\approx0.9781\)

Answer:

\(0.9781\)