When a roadway inclines @ angle of 16.5°. If the hill is 40 feet high, then how many feet of actual?
... road surface must be paved round to the nearest whole foot or:... road surface must be paved round to the nearest whole footor:Trigonometry is b
... road surface must be paved round to the nearest whole foot
or:... road surface must be paved round to the nearest whole foot
or:Trigonometry is based on a picture of a circle with the radius making an angle with the x axis. You carry this picture in your head, not your calculator. Trig is mostly imagination and the rest memorization.Remember Chief SohCahToaSin = Opposite/HypotenuseCosine = Adjacent/HypotenuseTangent = Opposite/AdjacentAlso memorize:Sec = 1/CosCsc = 1/SinCot = 1/Tansec(16.5) x 40 = 140.8 feet which we round to 141 feet.
