A shell fired from the base of a mountain just clears it. If `alpha` is the angle of projection, then the angular elevation of the summit `beta` is

The length of the shadow of a person s cm tall when the angle of a elevation of the sun is alpha is p cm. It is q cm when the angle of elevation of the sum is beta . Which one of the following is correct when beta = 3 alpha ?

A particle is projected over a triangle from one end of a horizontal base and garzing the vertex falls on the other end of the base . If alpha and beta the base angles and theta the angle of projection then show that tan theta = tan alpha + tan beta .

A particle is projected over a traingle from one end of a horizontal base and grazing the vertex falls on the other end of the base. If alpha and beta be the base angles and theta the angle of projection, prove that tan theta = tan alpha + tan beta .

A particle is thrown over a triangle from one end of a horizontal base and after grazing the vertex falls on the other end of the base. If alpha and beta be the base angles and theta the angle of projection, prove that tan theta = tan alpha + tan beta .

A particle is thrown over a triangle from one end of a horizontal base and after grazing the vertex falls on the other end of the base. If alpha and beta be the base angles and theta the angle of projection, prove that tan theta = tan alpha + tan beta .

A particle is thrown over a triangle from one end of a horizontal base and grazing the vertex falls on the other end of the base. If alpha and beta be the base angles and theta be the angle of projection, prove that tan theta = tan alpha+ tan beta

If the range of a gun which fires a shell with muzzle speed v is R, then the angle of elevation of the gun is