Derive an equation to find angle between two intersecting ellipses.

Find the angles between two lines.

How do you define the angle between two intersecting curves?

Derive the formula to find the angle between two lines with slopes m_(1) and m_(2)

Derivation to find the distance between two points + examples

Derive an equation to find distance of a point on ellipse to the focus of ellipse.

Derive a formula for the angle between two lines with slope m1 and m2.Hence find the acute angle between the lines sqrt 3x+y=1 and x+sqrt3 y=1 .

Condition of intersection of line and ellipse

An ellipse is inscribed in a reactangle and the angle between the diagonals of the reactangle is tan^(-1)(2sqrt(2)) , then find the ecentricity of the ellipse