1 105) - 46. If the straight line m...
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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

11th - 12th Class
Maths
Solution
128
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( 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} )
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