已知sina=2根号5/5,求tan(a+π)+sin(5π/2+a)/cos(5π/2-a)

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已知sina=2根号5/5,求tan(a+π)+sin(5π/2+a)/cos(5π/2-a)已知sina=2根号5/5,求tan(a+π)+sin(5π/2+a)/cos(5π/2-a)已知sina

已知sina=2根号5/5,求tan(a+π)+sin(5π/2+a)/cos(5π/2-a)
已知sina=2根号5/5,求tan(a+π)+sin(5π/2+a)/cos(5π/2-a)

已知sina=2根号5/5,求tan(a+π)+sin(5π/2+a)/cos(5π/2-a)
sina=2根号5/5>1/2
π/2