求3分之4兀的正弦余弦和正切值 分别为:根下3/21/2根下3《唯一论文工作室》独家提供
求三分之二π正弦,余弦,正切 sin(2/3)πsin(π-π/3)sin π/33/2cos(2/3)π=-cos π/3=-1/2tan(2/3)π=-tan π/3=-√3
求七π分之三的正弦,余弦和正切值是多少? tan(3/7π)=0.137271sin(3/7π)=0.135995cos(3/7π)=0.990709
求3分之4兀的正弦余弦和正切值 分别为:根下3/21/2根下3《唯一论文工作室》独家提供
求三分之二π正弦,余弦,正切 sin(2/3)πsin(π-π/3)sin π/33/2cos(2/3)π=-cos π/3=-1/2tan(2/3)π=-tan π/3=-√3
求七π分之三的正弦,余弦和正切值是多少? tan(3/7π)=0.137271sin(3/7π)=0.135995cos(3/7π)=0.990709