Can v vector have direction angles as `45 ^(@), 60^(@), 120^(@)` ?

Answer the question A line makes angles 30^(@), 60 ^(@) and 90^(@) with positive directions of X,Y and Z-axes, repectively. Find its direction cosines.

Write the direction cosines of the vector hat(j) .

If the sum of the ascute angles tan^(-1)x and "tan"^(-1) (1)/(2) is 45^(@) , then what is the value of x?

Tick the correct answer and a justify :In triangleABC,AB=6sqrt3,AC=12cm and BC=6cm.The angle B is a) 120^@ b) 60^@ c) 90^@ d) 45^@

If the height and length of the shadow of a man are the same,then the angle of elevation of the sun is a) 15^@ b) 30^@ c) 45^@ d) 60^@

The ratio of the length of a pole and its shadow is 1:sqrt3 .The angle of elevation of the sun is a) 30^@ b) 45^@ c) 60^@ d) 90^@

Express the following angles in radian: 45^@

can a quantity have dimension , but no unit ?

Write a unit vector in direction of the sum of vectors veca = 2hati - hatj+ 2hatk and vecb= - hati +hatj+3 hatk .