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OpenStudy (anonymous):
Without using a calculator, determine two angles between 0 degrees and 360 degrees that have a cosine ratio of -1/2
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OpenStudy (anonymous):
Someone tell me how to do this please
OpenStudy (anonymous):
120 degrees and 240 degrees
OpenStudy (anonymous):
From special angles you have to know that the cos of 60 will give you 1/2 |dw:1354811584489:dw|
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