%% Eksemplet fra ark5:

syms r t

f = 2 + cos(t);

hold on
ezpolar( f );
ezpolar( '1' );
hold off

%% Areal

int( int(1*r, r, 1, 2 + cos(t)), t, 0, 2*pi )

%% 

hold on
ezsurfc( 'x*cos(y)', [0, 2, 0, 2*pi] )
ezsurfc( 'x*sin(y)', [0, 2, 0, 2*pi] )
ezsurfc( 'x^2', [0, 2, 0, 2*pi] )
ezsurfc( '8 - x^2', [0, 2, 0, 2*pi] )
hold off

%%

hold on 
ezsurfc( 'x*cos(y)', [0, 3, 0, 2*pi] )
ezsurfc( 'x*sin(y)', [0, 3, 0, 2*pi] )
ezsurfc( 'exp(-x^2)', [0, 3, 0, 2*pi] )
hold off