Question

If 4 tan x = 3, where 0º < x < 90°, i) find x, 1+ cosx ii) evaluate: 2- cosx

Answer 1

x=36.87. ,

ii)1.8

III)1.20

Explanation:

given that 4tanx=3 divide both sides by 4 to get tan x as 0.75 directly using a calculator inverse the value 0.75 using the tan function to get the angle as 36.87

•add the cosine of 36.87 directly to 1