Chapter 4.3, Problem 31E

(a)

To determine

Value of $\sin {10}^0$ using calculator.

Answer to Problem 31E

The value of $\sin {10}^0$ using calculator = 0.1736

Explanation of Solution

Given information:

A trigonometric function as

  $\sin {10}^0$

Calculation:

Consider the trigonometric function.

  $\sin {10}^0$

Set the calculator in DEGREE mode as the given angle $10°$ is in degree measure.

Now, use the calculator strokes as follows:

  $\boxed{(}\boxed{\sin }\boxed{(}\boxed{10}\boxed{)}\boxed{\text{ENTER}}$

The answer displayed in the calculator is 0.1736.

(b)

To determine

Value of $\cos {80}^0$ using calculator.

Answer to Problem 31E

The value of $\cos {80}^0$ using calculator = 0.1736

Explanation of Solution

Given information:

A trigonometric function as

  $\cos {80}^0$

Calculation:

Consider the trigonometric function.

  $\cos {80}^0$

Set the calculator in DEGREE mode as the given angle $80°$ is in degree measure.

Now, use the calculator strokes as follows:

  $\boxed{(}\boxed{\cos }\boxed{(}\boxed{80}\boxed{)}\boxed{\text{ENTER}}$

The answer displayed in the calculator is 0.1736.