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tan=P n /πd tan=P n /πd² tan=P n /πd³
(B-/2tanα [(B-/2tanα]+0.1m (B-/tanα [(B-/tanα]+0.1m
#2=SIN[#1] #2=COS[#1+30] #2=SQRT[#1/120] #2=TAN[#1] #2=TAN[#1+30]
(B-b)/2tanα (B-b)/2tanα+0.1m (B-b)/tanα (B-b)/tanα+0.1m
C=tan( a/2) C=2tana C=2tan( a/2)
tan5'×5.73 tan1'×5.73 tan1'×17.05 tan5'×17.05
C=tan(a/2) C=2tana C=2tan(a/2)
tan = Pn/ d tan =Pn / d 2 tan = Pn / d 3