A little mental math gets me to one answer being 30 degrees 😉
Manuel
x is an element of {30°, 90°, 270°, 330°}.
To solve, just set y:=cos(x), you’ll find that y=0 or y=sqrt(3)/2. This means that x has to be one of the four solutions above because it has to be in [0°,360°).
piterk
Actually, it’s impossible to solve equation, because x should be defined in radians, not degrees. This is first rule of trigonometric equations.
Loading...
A little mental math gets me to one answer being 30 degrees 😉
x is an element of {30°, 90°, 270°, 330°}.
To solve, just set y:=cos(x), you’ll find that y=0 or y=sqrt(3)/2. This means that x has to be one of the four solutions above because it has to be in [0°,360°).
Actually, it’s impossible to solve equation, because x should be defined in radians, not degrees. This is first rule of trigonometric equations.