sin0=0 sin30=1/2 sin45=√2/2 sin60=√3/2 sin90=1 cos0=1 cos30' = √3/2 cos45' = √2/2 cos60'= 1/2cos90'=0 탄젠트0:0 30 :1/√3 45 :1 60: √3 90:무한대
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