A ladder 3.5m long leaning against a wall of a house reaches a hight of 3.3m. (a) what angle does the ladder make with the ground

Answer 1

3.5/3.3 = hypotenuse/opposite side = cscA = 1/sinA

sinA = 3.3/3.5 = about 0.943

A = about 70.54 degrees use a calculator with an inverse trig function