Question

Solve for theta

Answer 1

\[4\cos \theta + 9 = 11\]

When: \[0 \le \theta \le 2 \pi\]


\[4\cos \theta = 2\]
\[\cos \theta = \frac{ 1 }{ 2 }\]
\[\theta = \frac{ \pi }{ 3 }\]

@SmokeyBrown Wondering if that's what you get to. Same kind of problem.

Answer 2

almost, you're missing another theta on the unit circle where cos(theta) = 1/2