已知角a的终边经过点p且cosa=x/3,求sina和tana
问题描述:
已知角a的终边经过点p且cosa=x/3,求sina和tana
答
sina=√9-x2/3
tana=√9-x2/x
已知角a的终边经过点p且cosa=x/3,求sina和tana
sina=√9-x2/3
tana=√9-x2/x