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OpenStudy (anonymous):
If the sin 30° is 1/2 , then the cos ____° = _____. (4 points) Question 4 options: 1) 60° ; 1/2 2) 30° ; sqrt 2/2 3) 60° ; sqrt 3/2 4) 30° ; 1
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jimthompson5910 (jim_thompson5910):
hint: sin(x) = cos(90-x)
OpenStudy (anonymous):
A? @jim_thompson5910
jimthompson5910 (jim_thompson5910):
correct
OpenStudy (anonymous):
thank you @jim_thompson5910
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