Betty observed that the lamp post in front of her house casts a shadow of length 8 feet when the angle of inclination of the sun is 60 degrees. How tall is the lam post? (In a 30-60-90 right triangle, the side opposite 30 is one-half the length of the hypotenuse).
The shadow is of length 8 feet. Suppose the height of the lamp is x feet. So the two sides of the right angle is 8 feet and x feet. From the condition, the ...
A word problem is solved.