Question
Using inverse trigonometric functions, find a solution to the equation cos(x)=0.2 in the interval 0≤x≤4π. Then, use a graph to find all other solutions to this equation in this interval. Enter your answers as a comma separated list. Thank you
x=
x=
Answers
Steve
cosx = 0.2
x ≈ 1.37
since cosx > 0 in QI and QIV, your answers will be
x = 1.37 and 2π-1.37
x ≈ 1.37
since cosx > 0 in QI and QIV, your answers will be
x = 1.37 and 2π-1.37