When angles between principal sections of two nicols are `0^(@)` and `180^(@)`, they are referred to as……….. .

The angle between two tangents to a circle may be 0^(@) .

If the angle between two vectors in increase from 0^(@) to 180^(@) , what is the effect on the magnitude of the resultant of two vectors ?

The sum of the angles of a triangle is two right angles or 180^(@).

In case of propagation of longidudinal waves, angle between directions of velocity of particle and velocity of wave is 0^(@) or 180^(@).

Assertion Angle (theta) between a and v in circular motion is 0^(@)lt thetalt180^(@) Reason Angle between any two vectors lies in the above range.

Assertion Angle (theta) between a and v in circular motion is 0^(@)lt thetalt180^(@) Reason Angle between any two vectors lies in the above range.

The sum of two angles is 180^@ . Then they are called ___angles.

Sum of the measures of two complementary angles is 180^(@)