From a point x 110 feet in front of a public library, the angles of elevation to the base of the flagpole and the top of the flagpole are = 28.5 roof. Find the height of the flagpole. STEP 1: Let F be the height of the flagpole and L be the height of the public library. Convert the angle 39 45 into decimal form. Use this value and an appropriate trigonometric function to find F + L, the total height of the library and flagpole. F+L= feet STEP 2: Find the height of the library, L. L- feet STEP 3: Subtract your result from Step 2 from your latter result in Step 1 to determine the height of the flagpole, F. F feet Need Help? Read it