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x= cos (t) y=sin(t) . Sketch the graphs of cos (t) and sin(t) [0<t<2 π ] Copy & complete the table: Sketch the graph of the equations [with coordinates ( x,y ) from table ].
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x=cos(t) y=sin(t) • Sketch the graphs of cos(t) and sin(t) [0<t<2π] • Copy & complete the table: • Sketch the graph of the equations [with coordinates (x,y) from table ]
Parametric DifferentiationWhen x& y are given in terms of a 3rd variable (the parameter, usually t)Differentiate the curve defined by: x=cos(t) y=sin(t) CHAIN RULE
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If the tangent is vertical, the gradient of the tangent is undefined. This is undefined when the denominator is zero: t=4 or 1
Calculate the equation of the tangent to the curve defined by: x=(t+1)3y=t2-2At the point (8, -1)