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OpenStudy (anonymous):
someone please help me If the sin 90° = 1, then the cos 0° = _____.
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OpenStudy (anonymous):
cos(0) = 1
OpenStudy (anonymous):
because the angles are complementary right ?
OpenStudy (anonymous):
It has to do with the unit circle. Basically what it is asking is what is the x-value at 0 degrees
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