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A straight line is inclined to the axes of x and z at angels 45° and 60° respectively, then the inclination of the line to the y-axis is |
30° 45° 60° 90° |
60° |
A straight line is inclined to the axes of x and z at an angle 45° and 60° l2 + m2 + n2 = 1 $\Rightarrow m^2=\frac{1}{4}$ $\Rightarrow m=\frac{1}{2}$ ⇒ angle made by 60° |
