在极坐标系中,曲线C:ρ=2acosθ(a>0) ,l : \rho \cos ( \theta - \frac{ \pi }{3})= \frac{3}{2} ,
14.But, basically you don't really need to remember these formulas as long as you remember how to express r in terms of rho sine phi, and x equals r cos theta. 事实上你不用记住这些公式,只需要知道r=ρ*sinφ,而x=r*cosθ 15.Rho-dependent termination is controlled by rho protein and...