y = sin ⁡ 1 x y=\sin \frac{1}{x} y=sinx1​

y = sin ⁡ x x y=\frac{\sin x}{x} y=xsinx​

y = x sin ⁡ 1 x y=x\sin {\frac{1}{x}} y=xsinx1​

y = a r c s i n x y=arcsin x y=arcsinx

y = a r c c o s x y=arccos x y=arccosx

y = c o t x y=cot x y=cotx

y = t a n x y=tan x y=tanx

y = a r c c o t x y=arccot x y=arccotx

x = ( t − sin ⁡ t ) ， y = ( 1 − cos ⁡ t ) x=(t-\sin t)， y=(1-\cos t) x=(t−sint)，y=(1−cost)

x 3 + y 3 − 3 a x y = 0 x^{3}+y^{3}-3 a x y=0 x3+y3−3axy=0 x = 3 a t 1 + t 3 , y = 3 a t 2 1 + t 3 x=\frac{3 a t}{1+t^{3}}, y=\frac{3 a t^{2}}{1+t^{3}} x=1+t33at​,y=1+t33at2​