Question

If cos theta= 0.58, find theta given that theta lies between 180° and 360°​

Answer 1

Explanation:

cos θ=0.58

`\theta=cos^(-1) (0.58) \approx 54.55^\circ,(360-54.55)^\circ\\\theta=305.45^\circ`

∵ θ lies between 180° and 360°