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[单选题]
已知角β的终边过点P(m,3),且sinβ=3/5,则下列各式正确的是()
A.当m=-4时,cosβ=4/5,tanβ=3/4
B.当m=4时,cosβ=4/5,tanβ=3/4
C.当m=-4时,cosβ=-4/5,tanβ=-3/4
D.当m=4时,cosβ=-4/5,tanβ=3/4
查看答案
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A.当m=-4时,cosβ=4/5,tanβ=3/4
B.当m=4时,cosβ=4/5,tanβ=3/4
C.当m=-4时,cosβ=-4/5,tanβ=-3/4
D.当m=4时,cosβ=-4/5,tanβ=3/4
A.m=10,n=6
B.m=10,n=3
C.m=10,n=4
D.m=10,n=8