Express the radians the fourth angle of a quadrilateral which has three angles `46^@ 30' 10'' , 75^@ 44' 45'', 123^@ 9' 35''` respectively, taking `pi=355/113` .

Three angles of a quadrilateral are 75^@, 90^@ and 75^@ . The fourth angle is

For the same angle of incidence, the angle of refraction in three different media A, B and C are 15^@, 25^@ and 35^@ respectively. In which medium will the velocity of light be minimum ?

For the same angle of incidence,the angles of refraction in three different mediaA,B and C are 15^@,25^@ and 35^@ respectively.In which medium will the velocity of light be minimum?

One angle of a quadrilateral has measure (2pi^(c))/(5) and the measures of other three angles are in the ratio 2:3:4 . Find their measures in radians and in degrees.

Three balls profected upwards with the same uinitial speed at angle theta = 30^@,45^@ and 60^@ respectively.Let the range of the ball be expressed by R_theta .Then:

Three light rays red, green and blue are incident on a right angled prism 'abc' at face 'ab'. The refractive indices of the material of the prism for red, green and blue wavelengths are 1.39, 1.44 and 1.47 respectively. Out of the three which colour ray will emerge out of face 'ac'? justify your answer. Trace the out of the face 'ac'? Justify your answer. Trace the path of these rays after passing through face 'ab'.

Find the angle in radian through which a pendulum swings if itslength is 75 cm and the tip describes an arc of length:- 10 cm