Find the value of cos 14°. Round to the nearest ten-thousandth.

a. 0.1367

b. 0.2419

c. 0.2493

d. 0.9703

We know that cos(30°)=sqrt(3)/2=0,8660 or 14° < 30° so cos(14°) has a greater value than 0,8660. You can remove answer a, b and c. Stay d which is the good answer and that is provided by your pocket calculator.

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