A Mathematician's love letter

The following is a Mathematician's Love letter:

     From
     A Mathematician's Love Letter
     De-Morgan's Apartment,
     Binomial Avenue,
     United States of Matrices.

    
     My Dear Love,

                  Yesterday, I was passing by your rectangular house
in trigonometric lane. There I saw you with your cute circular face,
conical nose and spherical eyes, standing in your triangular garden.

                Before seeing you my heart was a null set, but when a
vector of magnitude (likeness) from your eyes at a deviation of theta
radians made a tangent to my heart, it differentiated. My love for you
is a quadratic equation with real roots, which only you can solve by
making good binary relation with me.

                The cosine of my love for you extends to infinity. I
promise that I should not resolve you into partial functions but if I
do so, you can integrate me by applying the limits from zero to
infinity.You are as essential to me as an element of a set. The
geometry of my life revolves around your acute personality.
     My love, if you do not meet me at parabola restaurant on date 10
at sunset, when the sun is making an angle of 160 degrees, my heart
would be like a solved polynomial of degree 10. With love from your
higher order derivatives of maxima and minima, of an unknown function.
    

Yours ever loving,
     Pythagoras