SOLUTION: given sin0 is -1/sqrt2 and 0 lies in quadrant iv, find cos0

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Question 756256: given sin0 is -1/sqrt2 and 0 lies in quadrant iv, find cos0
Answer by lwsshak3(11628) About Me  (Show Source):
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given sin0 is -1/sqrt2 and 0 lies in quadrant iv, find cos0
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sinx=-1/√2
x=7π/4 (reference angle=45º in quadrant IV)
cosx=1/√2
note: in quadrant IV sin<0 and cos>0