tan[arcsin(-3/5)]=怎么考虑
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tan[arcsin(-3/5)]=怎么考虑
tan[arcsin(-3/5)]=
怎么考虑
tan[arcsin(-3/5)]=怎么考虑
设 x = arcsin(-3/5),
sin(x) = -3/5,(x为负角)
则tan[arcsin(-3/5)]=tan(x) = -3/4
-3/4
令arcsin(-3/5)=A,即sinA=-3/5(A为第三或第四象限角)
故tan[arcsin(-3/5)]=tanA=±3/4。
计算器-3/4
-3/4
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