Question

Let f(x) = cos(x). Solve the equation f(x) = 0 on [0, 2π). (Enter your answers as a comma-separated list.)

Answer 1

$\frac{\pi }{2}$, $\frac{3\pi }{2}$

solve cosx = 0

x = $cos^{-1}$(0) = $\frac{\pi }{2}$, $\frac{3\pi }{2}$