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Mathematics 15 Online
OpenStudy (anonymous):

Use the fact that the period of cosine and sine functions is 2π or 360° to find the cosine and sine of 1,110°.

OpenStudy (mathstudent55):

Keep subtracting 360 deg from 1110 deg until your result is a number from 0 to 360 deg. Then take the sine of that angle.

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