a cone has a base diameter of 2.8 meter and a slant height of 2.5 meter. find the angle that the cone makes with the vertical at the top of the cone?
+118656 a cone has a base diameter of 2.8 meter and a slant height of 2.5 meter. find the angle that the cone makes with the vertical at the top of the cone?
Draw the pic and maybe you will be able to see what you are being told more easily.
radius is 1.4
slant height = hypotenuse = 2.5
the vertical up the centre of the cone is at right angles to the radius
you want the angle of the triangle up the top between the central perpendicular and the hypotenuse
sin(angle)=1.4/2.5
etc
