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OpenStudy (anonymous):
Give an example of a real number t for which cos t is negative and sin t is negative.
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OpenStudy (anonymous):
Anything between 3.14 and 4.71.
OpenStudy (jdoe0001):
check your Unit Circle notice the quadrants in radians where cosine and sine are negative
OpenStudy (anonymous):
Yeah, and my unit circle says both sin and cos of any number are negative in quadrant 3, which lies between pi (3.14) and 3*pi/2=4.71.
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