JAMB - Mathematics (2018 - No. 31)
A man stands on a tree 150cm high and sees a boat at an angle of depression of 74°. Find the distance of the boat from the base of the tree.
52cm
43cm
40cm
15cm
解释
Tan 74 = 150/x
x = 150/tan 74
= 43.01cm
Tan 74 = 150/x
x = 150/tan 74
= 43.01cm