When expressing arguments of trigonometric functions in Mastering assignment answers, use radians unless the question specifically asks you to answer in degrees.
Conversion — To obtain an angle in radians, multiply the angle in degrees by /180. Degrees-to-radians conversion tools are available over the Internet. You can also ask your instructor to suggest one.
Grading — Your answer will be graded correct as long as it is algebraically and trigonomically equivalent to the program's answer, even if it looks different.
For example, if a question asks you to find the horizontal component of a vector of length 10 that's directed 30 degrees above the horizontal, Mastering will accept "10*cos(/6)", but not "10*cos(30)". Use the pi symbol to avoid possible rounding errors.
To insert the pi symbol in the answer box, use either of the following methods:
Enter \pi from your keyboard. To view a keyboard on your mobile device, open the Letters menu on the toolbar.
Conversion — To obtain an angle in degrees, multiply the angle in radians by 180/. (Use the pi symbol in the answer box to avoid possible rounding errors.) Radians-to-degrees conversion tools are available over the Internet. You can also ask your instructor to suggest one.
Grading — Your answer will be graded correct as long as it's algebraically and trigonomically equivalent to the program's answer, even if it looks different.
For example, if a question asks you to find the horizontal component of a vector of length 10 that's directed 30 degrees above the horizontal, Mastering accepts "10*cos(30)", but not "10*cos(/6)".
To insert the pi symbol in the answer box, use either of these methods:
Enter \pi from your keyboard. To display an answer keyboard on your mobile device, open the Letters menu on the toolbar.
Tips for answering questions in radians
/180. Degrees-to-radians conversion tools are available over the Internet. You can also ask your instructor to suggest one.
Letters menu on the toolbar.
from the 
Symbols menu.