1.

A fighter plane flying horizontally at an altitude of 2 km with speed of 540 kmph passes directly over head an antiaircraft gun. If the gun can fire a bullet at the muzzle speed of 500ms^(-1) , at angle with the vertical the gun should fire the bullet so that the bullet hits the plane ?

Answer»

`COS^(-1)(3//10)`
`Sin^(-1)(3//10)`
`TAN^(-1)(10//3)`
`45^(@)`

ANSWER :B


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