Question

( sum_{90^{circ}}^{45} tan =90 )
( cos ^{2} alpha+cos ^{2} beta+cos ^{2} y=1 )
( alpha=beta=45^{circ} )
( =frac{1}{2}+frac{1}{2}+cos ^{2} y=1 )
( cos ^{2} y=0 )
( y=90^{circ} )

# 1 105) - 46. If the straight line makes an angle n/4 with each X - axis and Z- rays then the angle made by the line with Y - axis is: a) /3 b) /2 n ood 1/8 d) to/4 donne

Solution