Find the equation of normal to the curve x^2+y^2=r^2 at p(t).

the equation of the normal is xsin​theta=ycostheta............

 

differiante the given equation to given the slope.. and the inverse of the slope will be the required normal slope. then use the line eqation form and then the answer comes

 

for the given circle euation P(t) is (rcostheta,rsintheta).. substiute the given point in the line equation to get the answer