Question

find the function value.
sin 66°

sin 66° ≈ □
(round to four decimal places as needed.)

Explanation:

Step1: Use calculator in degree mode

To find $\sin 66^{\circ}$, we use a calculator set to degree mode.

Step2: Calculate the value

Enter $\sin(66)$ into the calculator. The calculator gives the value approximately equal to $0.9135454576$.

Step3: Round to four decimal places

Rounding $0.9135454576$ to four decimal places, we look at the fifth decimal place which is $4$. Since $4 < 5$, we round down. So the value is $0.9135$.

Answer:

$0.9135$