Equation of the curves are 
and 
Slope of the tangent at 
= 
(say)
Slope of the normal at is 
Point 
= 
= 
= 
Equation of the tangent is 
And Equation of the normal is 
Find the equations of the tangent and normal to the given curves at the indicated points:(v) x = cost, y = sin t at t= π/4
Find the equations of the tangent and normal to the given curves at the indicated points:(v) x = cost, y = sin t at t= π/4