Angle between two curves: how it is equal to angle between tangents

Angle between two planes

Angle between two lines

Angle Between Two Vectors

Comprehesion-I Let k be the length of any edge of a regular tetrahedron (all edges are equal in length). The angle between a line and a plane is equal to the complement of the angle between the line and the normal to the plane whereas the angle between two plane is equal to the angle between the normals. Let O be the origin and A,B and C vertices with position vectors veca,vecb and vecc respectively of the regular tetrahedron. The angle between any two faces is

Comprehesion-I Let k be the length of any edge of a regular tetrahedron (all edges are equal in length). The angle between a line and a plane is equal to the complement of the angle between the line and the normal to the plane whereas the angle between two plane is equal to the angle between the normals. Let O be the origin and A,B and C vertices with position vectors veca,vecb and vecc respectively of the regular tetrahedron. The angle between any edge and a face not containing the edge is

In the following figure, if the angle between two chords AB and AC is 65^@ , then the angle between two tangents which are drawn at B and C is __________

Find the angles between two lines.

Let y=e^(x^2) and y=e^(x^2) sin x be two given curves . Then the angle between the tangents to the curves at any point of their intersection is

If the angle between two radii of a circle is 130^(@) then the angle between the tangents at the ends of the radii is

If the difference between two supplementary angles is equal to one right angle then find the angles.