(a) Given that , find . (b) A ladder, LA, leans against a vertical pole at a point L which is 9.6metres above the groung. Another ladder, LB, 12 metres long, leans on the opposite side of the pole and at the same point L. If A and B are 10 metres apart and on the same straight line as the foot of the pole, calculate, correct to 2 significant figures, the : (i) length of ladder LA (ii) angle which LA makes with the ground.
Explanation
(a) Using SOHCAHTOA, then Opp = 5 and Hyp = 13 = = (b) Taking ,