直线斜率与倾斜角的关系,希望对你有所帮助
cosα=-3/5,sinα=√(1-cos²α)=4/5∴tanα=sinα/cosα=(4/5)/(-3/5)=-4/3直线的斜率是:k=-4/3
已知cosα=-3/5tgα=√(1-cos²α)/cosα=√(1-(-3/5)²)/(-3/5)=-(4/5)/(3/5)=-4/3
cosα=-3/5cos²α=9/25sin²α=1-9/25=16/25sinα=4/5tanα=(4/5)/(-3/5)=-4/3