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OpenStudy (anonymous):
EVALUATE cos(sin^-1(-5/13)) . your answer using as a fraction the slash bar (/)?
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OpenStudy (mertsj):
Since the sin of the angle is negative, the angle must be in quadrant 4. The cosine is positive in quadrant 4. Let us make a picture:
OpenStudy (anonymous):
Is it +/- 12/13? I'm not sure
OpenStudy (mertsj):
|dw:1334016883007:dw|
OpenStudy (mertsj):
cos = 12/13
OpenStudy (anonymous):
Thank you :D
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OpenStudy (mertsj):
yw
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