Question: If projectile is fired from the origin of the coordinate system with an initial velocity vo and in direction making and angle a with the

If projectile is fired from the origin of the coordinate system with an initial velocity vo and in direction making and angle a with the horizontal, calculate the time required for the projectile to cross a line passing through the origin and making an angle a with the horizontal, calculate the time required for the projectile to cross a line passing through the origin and making an angle β < a with the horizontal.

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